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Z800 Power Supply replaced with Z840 Power Supply

Q: Z800 Power Supply replaced with Z840 Power Supply

I have 2 failed Z800 power supplies (1150 watt version). After some internet research I am led to believe this is a common problem and related to the PS capacitors. Since I do not know how to do this capacitor replacement (yet). I thought I would buy a new PS. However, I do not want to buy a Z800 PS since it seems to me to be a defective design. Can anyone chime in and tell me if the new z840 1125 watt PS will work with my older z800? I have called HP support and spoken with the correct support people on this and they were not able to confirm if the Z840 PS will work (fit) on the z800. The closest confirmantion I recieved was that if it fits then it should work. Instructions to fix the capacitors:http://h30434.www3.hp.com/t5/Business-PCs-Workstations-and-Point-of-Sale-Systems/Z800-power-on-issue... Same issue I am facing:https://www.youtube.com/watch?v=f563JGeoxaw On a side note, can anyone recommend a good service tech to make such capacitor repares in Southern California or insrtuctions on how to make this repair (with pictures). Thanks

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Preferred Solution: Z800 Power Supply replaced with Z840 Power Supply

I recommend downloading and running Reimage. It's a computer repair tool that has been proven to identify and fix many Windows problems with a high level of success.

I've used it in the past to identify and fix everything from blue screens (BSOD's), ActiveX errors, corrupt files and processes, dll/exe/sys errors, recover lost memory, Windows update problems, defragging, malware removal etc.

You can download it direct from this link http://downloadreimage.com/download.php. (This link will automatically start a download of Reimage that you can save to your computer.)


Hi, We bought a HP Z840 recently but we're a bit underwhelmed with the available power supply connections. There's no 8-pin PCIe power cable, and only three PCIe 6-pin cables. Is there any way to have more of these?

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Just received the Workstation from USA ( 110 vac 50hz ), here we are using 230 vac 60hz, my question is ;is there any power selection to be switched or can i just simply plug in to 230vac ??Thanks 

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My HP Z800 was having a random power down issue and more recently the power supply has been acting up so i wanted to replace it. To be clear, I paid $200 for this computer and am not interested in paying another $100 for a used 850w off of ebay. I did notice that the HP Z820 uses a power supply that looks identical to the z800 and I am wondering if the Z820 power supply will work in my Z800. i have read around and found in a few places that the upgraded 1100W power supply works for both the Z800 and Z820 but did not find anything on the 850w version. 

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Hi !! All,

Happy New Year to all members and technical assistants.

I have a little issue in which I require some help and guidance.
I have a PIII 900MHZ 256 MB memory with a ASUS MB-

Recently it died on me and assumed that the reason I could not get to power
it up is due to my power supply. I went out and spent the money and bought a brand new power supply from a computer retailor. I saw him remove it from a brand new case.
I installed the power supply , trying to power it up, I can see the fan rotate a little bit but not enough to power on. Changed socket and it power on.
It booted up but after 30 sec, it shut itself off and now I cannot power it back on until 15 min. later when I went and change power socket once more.
This time, the power did not stay up very long. As soon it powered up, no more than 1 min later while it was loading windows Xp, it shut itself off nad now again can't power it back on. I have a power extention and power bar in which I used and both shuts the computer off. Anything else plugged to it doesn't seem to do any affect. This is the second new power supply I'm trying.
What else can it be ? I have not tried to place the computer in a different room on a different plug yet. I will try that tonight but in the meantime, what else can I try ?

Thanks for your help and listening.

Cheers !!


A:Pc wont power on after power supply replaced

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After replacing a bad power supply on an HP desktop, when I plugin a mini-usb stick it says "device not recognized."

Any ideas? What should I try?

A:Replaced Power Supply

Did you try the drive in another machine to see if it was recognized? Are other USB devices recognized on your machine?

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I recently had my power supply die on my and got it replaced.

Since then I have not been able to print to my hp laserjet, or use my logitech Wingman controller which are usb devices.

I have an intel pentium 1.7 GHz with 512 M ram running Windows XP.

The laserjet appears to be recognized. When I unplugged it and plugged it back XP told me it had found a new device and set it up, but it always sets it up to work off-line. When I put it on-line I get an error message when printing about the printer not being connected properly.

When I tried to manually add the Wingman it just said device not connected and I couldn't do anything else.

I went through the trouble-shooting guide, including deleting all the usb connections and rebooting. Everything got added back but I still had the same problems.

Any advice would be welcome.


A:usb problem after power supply replaced

A dead power supply is not a good thing. Did it go out with a bang or popping noise? There is a 50/50 chance it may or may not do damage to the components inside the pc.

I recently had to rebuild a pc for my wifes father. When the psu blew it killed the motherboard, cpu, memory and hard drive when it went.

Im wondering if when the psu failed it caused a surge in your system and could have damaged components on the motherboard. I would definately take a look at the motherboard up close. Look at the capacitiors. Check to make sure their not expanded, leaking, or blown.

As for your usb and printer problems they could be related to the motherboard being flaky due to the power supply failing.

This of course is only guessing at this point, but i wanted you to be aware of what can happen when a psu goes out.

More info on your system would be greatly helpful......


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I have a PC that is about a year old specs are:

MB: Asus M2n68-N
CPU: Amd Athalon 64 x2 Dual Core 6000+ 3.10ghz
Ram: 8gb
OS: Windows 7 x64
GFX: Nvidia GeForce 9600GT 1gb
HD: 1TB Harddrive (not sure on brand and case is closed up atm)

Several weeks after I bought this computer it started randomly shutting down on me I called tech support @ ComputerLX.com where I purchased the computer and he gave me the run down on getting an a new power supply covered under warranty. I did this sent in my old one and installed the new one and it worked fine for a couple of months and started shutting down on me again. I dealt with the nuisance and turned it back on whenever I could and limited my use, sent in the power supply and got a new one again, same scenerio 2 more times finally I decided to quit using the **** power supplies this guy was sending me and went to my local TCComputers and bought a 730w Kingwin Max Power PS. I know this isn't a top of the line PSU but its 200w higher than the others I've had in the past and much better quality. Well, I bought it on 6/10/10 4 months ago, and for the last 2 months I have been having the SAME shutdown issues.

If anyone could PLEASE PLEASE help me shed some light on this situation I would appreciate it sooooo much.

Thank you in advance for taking the time to read my post.

A:Replaced Power Supply x5 STILL SHUTS DOWN!

I just realized I posted this in the wrong forum, please disregard.

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I built this new computer about a month ago.
core i5 2500k
GTX 570
8gb of ram
Windows 7
Old Power Supply: http://www.newegg.com/Product/Produ...ords&cm_mmc=KNC-GoogleAdwords-_-pla-_-NA-_-NA

It's a pretty by the book build. Last night though, I walked into my room and noticed the power off, and it wouldn't turn on. I opened it up, checked all the connectors, gave it another shot, and nothing.

My old computer had a 750 watt Cooler Master (http://www.newegg.com/Product/Product.aspx?Item=N82E16817171024) in it, so i took that out and tossed it into the new system while I wait for OCZ To send me a new PSU. Everything seemed great, I did my normal tasks for the rest of the night. When I launched Battlefield 3 though, the PSU actually makes a very odd buzzing noise. I don't remember this at all from my old computer. The red warning light doesn't go on or anything, it just buzzes. It also happens in Dungeon Defenders. The second I turn either game off, it stops.

Right now I'm back to basic tasks, but is this just due to the extra load from the new system? My old computer probably could have run fine off something much weaker than 750w (it had 8800 gt / Q6600), so I'm wondering if this it's just finally getting a workout or something. It has always run fine, I'm not sure why it would act up in the new comp. I'm sort of stuck until OCZ Gives me a replacement. Is it safe to run this thing?

A:Power Supply Died, Replaced With Old One

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Computers power supply came to a halt the other day: Its cooling fan was not running and computer showed no activity.

Well, I replaced the power supply with a unit of the same band and specifications, and its now up running with the cables connected to the floppy drive, gard drive and CD drive as before.

The CPU cooling fan is running and there is a green light on the HD so the must be hole thru ...

The computer starts up at all.
No activity from the floppy drive indicates that the must a a fatal error of some sort ....

Any suggestions ?

My computer : Zeitec Celeron 433
Win98 SE


A:Replaced power supply didnt help

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Put in a new 430W PSU (Thermaltake) replacing the 300 watt Power Man which was about 6 years old. With better specs obviously.

Now I see that the apps open and run quicker.

Is this my imagination? Could the power from the older supply have been strained, with what amounted to slower delivery - or maybe the vid card drawing too much % from PSU?

Should food also taste better? Colors around me, pulse more vibrant?

A:Power Supply replaced - Is it my imagination?

Your whole life will begin to move at warp speed. Hang on!!!!

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Long story short. My power supply shorted mid week while my computer was booting up. Snap, crackle and then a dead computer. I replaced the power supply after 3 days and crossed my fingers. Computer came up but was slow going though the USB configuration in post. Taking about 2 to 3 minutes to get though the post and then load Windows XP pro.

Eveything seems to work except all my USB ports do not pickup any thing plugged into them. I have 4 on the back of the MOB and 4 extra on the case in the front. I uninstalled the USB controller, shut down the computer and started it back up. Found alll the controllers and installed them again but after they all were found it showed 3 unknown device when I checked in device manager. I did not have any usb devices attached or plugged in at that time. I then decided to flash the bios with latest version which went fine. No luck with the usb. Updated my intel chipset to the latest from ASUS. Uninstalled and reinstalled the USB controller. USB configuration now zips by in the post, no unknown devices showing up in hardware manager but the usb ports still do not detect anything when I plug into them. I have devices that need the USB ports.....printer, cd rom, zip drive, several thumb drives. ?????? Do not know what to try next except to reformat a HD, install windows and start over. Did not want to spend several days doing that if I do not need to. Anyone have any suggestion? (my profile has my computer specs)

Nola1... Read more

A:Replaced power supply now USB ports/hub will not detect

When the power supply blew it might have damaged the USB controllers. If you can't get to work and if you have spare PCI or PCI-E x1 slots, you can get a expansion card with USB ports.

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I replaced the power supply  and the noise stopped! However, I still hear a pulsing sound, that I'm guessing is the fan on top  of the CPU. Could you please tell me what the correct fan is, how to clean the heat fins and or how to replace the heat sink and fan?Thanks!DavidDD1 

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Just replaced a bad power supply in my HP m1080n Media Center. Computer turned on and said windows failed to load. Gave me several options, Boot normally, boot in safe mode, boot from last working configuration, etc... Tried all of these and sometimes the comp shuts off as soon as I make a selection, and sometimes i get all the way to the XP boot screen and the loading bar starts to move before it craps out. Tried the recovery disk but no luck there either. Any ideas?

I've also posted this question in the Hardware forum because I'm not sure if it's a hardware or a software problem.

HP Media Center m1080n

Replaced original Bestec 300W PSU with 300W HIPRO PSU ordered from HP.

System specs are at this link... http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00213797&lc=en&dlc=fe&cc=us&product=426502〈=fe#N346

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Hello I was wondering if someone would have a salution for me or suggestion.

I have recently bought a

MSI 6791-FX 400/533/800FSB Pentium 4 Micro ATX Motherboard with Audio and LAN


? Supports IntelŪ Socket 478 for PentiumŪ 4 (Northwood) Processors
? Support up to 3.2GHz/FSB 800
? Supports FSB 400/533/800 MHz


? SiSŪ 648FX Chipset
? Supports IntelŪ PentiumŪ 4 processors with data transfer rate up to 800MHz.
? Supports 64-bit high performance DDR333/DDR266 memory controller.
? Supports AGP 8X/4X interface at 0.8v or 4x at 1.5v with fast write transaction.
? Dual-IDE ATA 66/100/133.
? ACPI & PC2001 compliant enhanced power management.
? Low pin count interface for SIO
? Integrated audio controller with AC97 interface.
? Integrated high speed USB 2.0 controller, 480Mb/s.

Main Memory

? Supports two 184-pin DDR DIMM.
? Supports up to 2GB memory size without ECC.


? One AGP (Accelerated Graphics Port) slot.
- AGP specification compliant.
- Supports AGP 2.0 4x/8x.
? Three 32-bit PCI bus slots.


? RealTek 8100C PHY.
- Supports 10Mbps and 100Mbps auto-negotiation operation.
- Supports ACPI power management.


? 6 channels software audio codec RealTek ALC655.
- Compliance with AC'97 v2.3 Spec.
- Meet PC2001 audio performance requirement.

and a

Titanium Powmax Assassin 500Watt 20 or 24 Pin Power Su... Read more

A:Replaced motherboard and power supply now I freeze.

start by checking all the jumper settings.If there ok or resetting them doesn't work try flashing the bios if you can. make sure all cards,connectors tightly inserted,If problems persist remove devices one at a time.if it works when you remove a device then that device is the problem and needs to be replaced.If any of these are shorted they could cause freezeing.

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First time poster here, hope you all can help me with this.

Yesterday the power supply burnt out in my Dell Dimension 9150. It had a 375W power supply and I upgraded to a Corsair CX750M (750W) because over the years I have added and added to the motherboard and maxed it out! I believe maxing out the motherboard is why the power supply burnt up. That or the age of the old power supply.

Anyways, after installing the new power supply, I was able to turn on the computer without any issue. However, as the Windows 7 logo was booting up for the first time, the Windows logo froze and then the screen flashed a quick blue and rebooted. After multiple times of running the repair option from the system files and then also trying to repair from the Windows disc, Windows 7 still will not boot. I even went into the repair mood and tried rolling back the Windows settings to the earliest save point and Windows still will not boot up.

I have seen a message that says it's a hardware issue and that if I have installed any new hardware recently, I should remove it. But the power supply is the only new hardware. Did I miss something, am I supposed to change a setting in the BIOS?

I did also change out the motherboard battery when I had the case open, but the BIOS seams to have saved all the settings. Any ideas guys? I would hate to have to reinstall Windows 7.

A:Replaced Power Supply and Windows 7 Will Not Boot

Change the setting for the OS hard drive in the Bios from AHCI to IDE/Legacy or vice-versa and see if it boots into Windows then.

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The power supply on my 4-yr old custom build recently gave out. I replaced the PS, and the machine is running normally again, except I can not get sound out of the speakers.

Here are what I believe to be the pertinent facts...
Sound worked completely fine prior to PS replacement
There are no errors being thrown that I can see
Volume is turned up and speakers show that they are un-muted.
When sound file is playing, the level indicators are registering positively.
Gigabyte motherboard has Realtek HD audio
The Realtek audio manager indicates that the speakers are the default output
Headphone output via the front-panel jack is working OK
Line-in via the rear jack is working OK
I have tried both options for headphones mute speakers and headphones and speakers are separate output. Still nothing from speakers.
The machine is dual-boot Win7/Linux. Sound from speakers works correctly when booted in Linux.
Tried unplugging the front panel header, no difference.
It acts like the speakers are simply muted, but there is no indication of that anywhere. I've messed with it for 2+ hours and have gotten nowhere.



A:Replaced power supply, now no sound from speakers

Try uninstall/reinstall the RealTek. Go to the Device Manager, RIGHT click on the RealTek entry in the Sound section. Then LEFT click "Uninstall". DO NOT uninstall the drivers. Restart the PC and when Windows starts it will detect and reinstall the sound. This corrects any Windows sound corruptions and may fix your problem.

(Royals/Chiefs fan).

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Greetings all!
This is my first post and I'm hoping to be able to reciprocate with answers from my own knowledge and experiences, though limited. Thank you in advance for your kindness and patience.
I have an older PC (six years) running Windows XP (fully updated) with an Athlon 64 CPU, 2G ddr, 250 GB Hdd, onboard Nvidia graphics chip set on an Asus motherboard. For years the system has been stable & reliable but last night I found it dead. After troubleshooting the basics (power strip, power outlet, power cord, on/off switch etc.), I figured a new power supply was in order since everything worked fine the day before and then nothing. So... while putting in a new TEC 385 W PSU I noticed the 20 +4 connector was different from the old 24 plug. Stupidly, (looking back) I left the 4 plug off. Also I noticed a six plug connector for the PCI express but no receptor on the motherboard for it. I figured since I had nothing in the PCI slots or the PCI express slot,; no big deal, just leave it unconnected. Power on and I see a small amount of SMOKE coming out of the carriage near the front panel USB/1394 connectors and the Hard drive! Quickly unplugged & rechecked all the connections. Didn't find a problem there. Plugged the 4 pin connector next to the 20 pin on the power connector (finally) and tried again. This time no beep, CPU fan spins up, Chassis fan spins up, hard drive does not spin up and the HDD light on the front panel stays lit. Nothing (not ... Read more

A:Replaced power supply and now no video or HDD spin up!

Also I noticed a six plug connector for the PCI express but no receptor on the motherboard for it.Click to expand...

this is rather confusing, first of all the six pin PCIE connector plugs into a PCIE Graphics card that requires a a 6 pin connector, not the motherboard, secondly, did you plug in the 4/8 pin CPU power connector (i'm assuming its a 4 pin on a machine that old.)
Thirdly, and I don't know if its possible to force it in or not...but was the 4 pin you eventually plugged into the 20+4 the CPU power plug? was there a bit of force involved?

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Hello My power supply died about a week ago.  I know this because it gave me a 4 beep code.  I followed the troubleshooting instructions, and when plugged in with all the cables unplugged, the fan didn't spin.  So confirmed dead. I got the new power supply today, and I plugged it in with no cables attached.  The fan spun.  Power supply confirmed good. However, when I reattached everything and turned it on, I got the four beep code again.  Does this mean my system board is fried?  And if so, where on the board is the id so I can order another?  I have the intel dual core cpu if that helps any.  Not the Extreme, just the duo. Thanks in advance for your help.  

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The basic problem is i get "no video signal" on my screen.....

here is some background info:

I run XP home, computer was working FINE, no problems, 1 day it would not start. replaced power supply, and it now turns on, fans spin, i hear HD spinning, mother board connection in place BUT i have no video signal now....is there a monitor connection on the motherboard from the power supply that i missed? I dont see anything....what else could it possible be??? i tried 2 different monitors and same result...
any help greatly appreciated..thanks. MAX

A:No Video Signal....power Supply Replaced

There may be a power connector to the video card depending on the video card.

What is the brand and model of the new video card?

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Hi -

Very inexperienced in computers - but I replaced my power supply and my video card. But when I boot up it says that the cd and dvd drives are not recognized. Can anyone give me any guidance?


A:Replaced power supply, cd/dvd drives not recognized

Make sure that the 4-pin connector is connected back into the cd/dvd drive and that the either SATA or IDE cable is connected also

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We had to replace the power supply in our desktop running Win XP, and since then, we have been having trouble with our browsers. What happens is that when multiple sessions are running (most usage is to view Youtube videos), after a while, the browser will hang for a long time and then come back with a "page not found" message. Closing the browser and opening a new browser session does not resolve the problem, and this appears to happen in both Firefox and IE. Rebooting the computer resolves the problem, but after a while it happens again.
In all other ways, the computer is acting normally.
I have tried uninstalling and reinstalling Firefox and all add-ons.

Any advice or ideas would be appreciated.

A:Firefox failing since power supply replaced

What are the specs on the new PSU? It sounds like your not getting enough power or memory to stay on task. You may also want to test your RAM. Please run this and report the results.

Download CPU-Z
CPU-Z is a freeware that gathers information on some of the main devices of your system.


* Name and number.
* Core stepping and process.
* Package.
* Core voltage.
* Internal and external clocks, clock multiplier.
* Supported instructions sets.
* All cache levels (location, size, speed, technology).


* Vendor, model and revision.
* BIOS model and date.
* Chipset (northbridge and southbridge) and sensor.
* Graphic interface.


* Frequency and timings.
* Module(s) specification using SPD (Serial Presence Detect) : vendor, serial number, timings table.


* Windows and DirectX version.

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Anyone heard of this problem? My PC maker replaced the power supply under the warranty. Now boot up hangs for 2+ minutes at the Intel M/B screen, then a black screen for another minute then Windows loads normally. It also operates without any problems once loaded.
If I unplug my Bluetooth dongle and Maxtor USB external HD boot up is almost as fast as before.
Is it possible that something fried when the P/S failed? The Bluetooth devices (keyboard/mouse) and the external HD operate normally once the machine is "awake".
I just had them check the tower for problems and they say nothing is wrong internally.

A:Boot up delay since power supply replaced

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Any advice here would be much appreciated. My Emachines T1840 power supply failed. I replaced it with a Bestec 250W power supply (same part as the one that failed). The machine is getting power, but does not boot. The LEDs are on, but are flashing very rapidly. I have checked connections on motherboard, all appear okay. I did not replace the CPU fan. Now I'm wondering whether or not this is the problem...Please help! Thank you!
Here are system specs:
CPU Fan Type: CPU Fan, H/SINK:3713S,845G CHIP,W/PUSH PIN 2093
Power Supply: PS 250 WATT 1670
CPU: CPU , Celeron 1.8 GHz CPEMINCL2100
MB: MB, Imperial 2095
Memory: RAM DDR-RAM (128MBX1) (Max. 2GB) 1923
Video: Video, integrated
Prim CD Model: CDRW, SW-240B/TG9(R400) 2434
Secondary CD: DVD ROM SD-616T/TG9 2510
HDD: HDD 40 GB 1360

A:Replaced emachines power supply...system does not boot

Are you certain that your Hard drive is plugged in tightly to the PSU? :approve:

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Just replaced a bad power supply in my HP m1080n Media Center. Computer turned on and said windows failed to load. Gave me several options, Boot normally, boot in safe mode, boot from last working configuration, etc... Tried all of these and sometimes the comp shuts off as soon as I make a selection, and sometimes i get all the way to the XP boot screen and the loading bar starts to move before it craps out. Tried the recovery disk but no luck there either. Any ideas?
Replaced original Bestec 300W PSU (part# 5187-6114) with 300W HIPRO PSU (part# 5188-2625) ordered from HP. HP was responsible for the part change, not me.

System specs are at this link... http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00213797&lc=en&dlc=fe&cc=us&product=426502〈=fe#N346
***UPDATE*** 6/26/09 11:52am
Now I'm thinking it's definitely a hardware problem. Slept on it, woke up, and tried to power on again. Computer came on, clicked start windows normally. Made it through the XP boot screen all the way to login. Logged in with password and it started to load... then shut itself off again. The only other thing happening that I've noticed is that all of my fans come on and stay on the whole time. Usually the case fan doesn't run constantly and only kicks on when I'm running programs that soak up a lot of resources (Photoshop and the like).

A:Solved: I replaced a bad power supply, now windows won't boot. Why?

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Hello -

My computer was suddenly not powering on. I replaced the power supply, and the computer booted up, albeit with 1 short beep followed by 3 short beeps at POST. I'm not sure what BIOS it is, but it is a 3-ish year old Asus motherboard.

The problem now is - it will boot to the Win XP login prompt, however it is completely unresponsive to my USB keyboard and mouse. Oddly, I believe it is providing USB power because I have another peripheral (USB MIDI synthesizer) hooked up that powers up just fine.

I tried pulling 3V CMOS battery, different USB mice/keyboards etc, no luck. Any ideas why the USB mouse/keyboard are not working after replacing PSU?


A:Replaced power supply, USB keyboard/mouse unresponsive

Which Asus board and what PSU did you use?

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We replace the existing power supply (model no. L305P-01) with a new power supply (model no. N305P-06) and the computer will come on put we are not getting a signal to the monitor.  Are the two power supplies similar?  Really not sure where to go next and any help/direction would be appreciated.

A:Replaced an Optiplex 755 Power Supply and now have no video feed

These units should both work on a 755 Mini Tower.   The DL2032 battery may need replacement.
Take out all ram and it should beep low and slow.
beeep  beeeep  beeeep beeep
Then add 1 ram stick.
Sort thru each chip one at a time which should be matching pairs of ram.

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I have a W540, which currently uses a 170W power supply (20V 8.5A) I also just recieved a docking station for a P50 which has a 230W power supply showing 20V 11.5A. The connectors look the same, but I'm hesitant to try the 230W power supply in the W540. Should this be ok to use the 230W power supply with the W540?


Go to Solution.

A:Power Supply Question - Can I use the 230W power supply with a W540?

230 watts is the maximum power supply, it only supplies the power needed by the computer. I sold my W540, so i can't test this for you. But i do the use the ThinkPad X1 Carbon with the 230 watts power adapter without any problem.

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Hello Forum,

Summary: Weird burning smell for 2 or 3 boots --> Doesn't turn on, no sounds or lights from comp --> replaced power supply --> worked for a few boots --> back to completely nonresponsive state 15 mins later (details follow....)

I do not know the system specs and I can't find them out without posting this issue at this time. It may not be that necessary to know the details but I can find out soon if necessary. Let's just say it is NOT a new computer - the motherboard is large - I could tell you the model in a later post - the processor is 1.x GHz, something like 512 MB RAM, I have 2 HDs. I am running Win XP.

Old Power supply: Was pretty old, up to 10 years old but maybe a few years younger (300 or 350 W). I haven't seen the computer much for 3 years since I started using and it was upgraded in the meantime.

One day I turned on my computer and shortly afterwards the room started smelling like burning metal/rubber or something acridly foul. Opened the case and nothing seemed to be boiling or noticeably hot, though I didn't really touch around. The only thing that was reasonably warm was the P/S. I thought I noticed the smell coming from it but it was only slightly smellier in that area, at most. Didn't add anything special or change anything in comp recently beforehand. Played loud music on in the night before but the speakers have their own power supply.

So I decided to replace the P/S - I purchased an hec HP485D 485W ... Read more

A:Solved: Computer Won't Turn on, no lights, replaced power supply

It's extremely likey that when your PSU blew it damaged your mobo as well. If you have removed and replaced everything else and nothing works then it's either your mobo or cpu. In this case it's likely your mobo.

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Could someone help?
My daughters emachine 1860 wouldn't turn on so I replaced the power supply and now it does turn on but nothing comes up on the screen - just blank screen.
The cdrw light comes on and the drive will open, the fans are running and the red Led light inside on the board is on, but nothing boots???
Does anyone have any suggestions??
Thank you in advance!!

A:Please Help with emachine 1860 ! Replaced Power Supply & now no startup beeps !! Help

is the monitor plugged in good, is it turned on, is it really working

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I have a DellHP-145SNF Power supply.
These wire's are coming from the Voltage regulator/control PCB inside the P/S.
There are 6 wires involved.
Here are 3 questions that I have,
1 - What is the Orange - "Power Good" looking for?
2 - What is the Brown wire for.
3 - What is the Purple - "+5VSB (Standby)" used for.

The Gray is Power ON when hooked to ground.
Black goes to ground.
Blue/White goes to -12V.


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Im working on a computer that turns on powers up, hard drive spins, etc. but no video is displayed. Ive replaced the motherboard, video card, RAM, power supply, and tried a new hard drive, is it possible that this could be a CPU problem? The computer is

Foxconn socket 939 mb
AMD Athlon 64 FX 3400+
Geforce 7600 GS 256MB Video Card
150GB SATA Hard Drive
420W Power Supply

I appreciate the help

A:I`ve replaced the motherboard, video card, RAM, power supply, but still no video.

Do you have another monitor that you can hook up just to check? Are you receiving any post "beeps" when you boot it up?

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Hey, i'm building a computer but i haven't realized that the power supply i need is an atx 2.0. What power supply should i get??

I was orignally looking at the Ultra X-connect but it doesn't support atx 2.0 Damn.

A:power supply atx 2.0 any suggestions as to a power supply?

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Toshiba Satellite L305-5955, Ive taken apart and replaced power jack. Not directly soldered to motherboard. While still apart, and battery out/in, connected power supply and still absolutely no response. Power supply is NOT original, and slightly different specs, i.e original 19v..6.3A

current 19v..3.1A

A:Toshiba Satellite L305-5955 does not respond to power supply, new power jack

Almost certainly the problem is that the current rating is wrong, if the laptop needs
6.3 A of current, it won't function on less (just as you can't use a 3A fuse for a kettle!)
Unfortunately it must be the right current rating, I know, I've been caught that way too!
Maybe you can exchange it?

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I have a Dell 8600 about two years old. When I plug in the AC adapter, it intermittently fades to the battery as though the plug was pulled out (its not) and of course the screen fades in an out when every time it swithces--it does it every 30 to 60 seconds or so. I switched to a different AC adapter (I have a Dell 600M with the same AC adapter)-same thing so I know it is something internally. Any ideas?

A:Dell Laptop Power Supply Fading In and Out--power jack is bad or loose?

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I picked up this Alienware 5700 off ebay to hopefully refurbish for my son but I'm new at this and still learning and so this thing has me baffled. The laptop is in pristine condition but shows no signs of life. When I plug in the power supply the green light on the power supply goes from solid green to blinking rapidly to the point you can barely see it. To me that would mean a short somewhere right ? If so where ? Has anyone else ever had experience with something like this ? I just don't want to go buying a new battery for a laptop that maybe fried already. Any help would be greatly appreciated.

A:No power, no lights but green light on power supply blinks rapidly

Remove the laptops battery and try the AC power only. If the green light does the same, it still could only be a bad AC adapter, or at worst, a shorted laptop motherboard

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I have an enquiry relating to video cards. In order to do my job, I need to get a card with at least 512MB of VRAM, preferably 2GB. However, the ones I've found online use 300w What's the maximum watts that I can use with my Lenovo H520s? And what would happen if I used a 300w video card in it? 
Mod:  edited Subject with a problem description


Go to Solution.

A:What graphics card will my H520s power supply support (PSU, power calculator)

Use a power supply calculator to get a accurate calculation of your power requirements.   Graphics card manufacturers have to figure a worst case scenario when giving power requirements.
Mod:  removed the Newegg calculator, which only gives a recommended psu size, rather than a power calculation.   The CoolerMaster gives both. 

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Hi, so I have had a powering issue with my previous power supply which was the Corsair CX600W so i purchased a newer power supply - the EVGA SuperNova G2 550W. I unhooked my old psu, hooked up my new one and the PC turned on and I turned it back off from the power button on the case. I also hava a boot drive problem so I unplugged the sata cables from my SSD and wanted to try to turn on the PC with only my HDD. I did this with the PSU switched off and the power cord unplugged. When I tried turning the PC on again the PSU made a clicking noise and nothing turns on. The motherboard Led's are lit up so it is definitely getting power but when I go to turn the computer on it just makes a quick clicking noise and nothing turns on. Any help is appreciated, thanks!

A:Power Supply makes clicking noise when I press power button

You may just need to drain the power off from the power supply and try again. Unplug the power to the power supply, press and hold the power button for 30 seconds, then plug it back in and try to turn on the computer again. If that doesn't put the old power supply back in and see if the PC works, or was the old one dead? If the PC works with the old one and not the new one then you may have gotten a faulty power supply.

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Ever since i got this new motherboard and CPU ive been having a bit of a nightmare with it.

Gigabyte ga-ma790fx-ds5 -Latest Bios
AMD Phenom Black Edition 9850,
4 gigs PC 6400 ram (Corsair XMS2 CM2X1024-6400
ATI Radeon 4870

The problem is that the motherboard will NOT power up at all with the 2 of the latest power supplies (600 watt+) i have.

It wont work at all with; (Nothing happens its just dead)
Arctic 600 watt Jeantech PSU (brand new and working)
Corsair 620 watt HX PSU (working)

It only seems to work with my Jeantech 450 Watt PSU and i cant for the life of me figure out why. Ive tried everything to get the board to work with the new PSU's. I had thought that the PSUs i got were dodgy but after testing out one in an older PC it worked fine.

Ive removed all parts and tried powering up and i cant get it to boot up. But the PC seems to work fine with the oldish 450 watt PSU which i find just unbelievable.

Can anyone help with this nightmare? Now on the Gigabyte site the CPU i have isnt listed as supported by this motherboard which is kinda worrying could this be the reason? If so how the old PSU boots up.

I just want to have the fracking thing working with the right PSU.

A:Power Supply Wont Power up - Gigabyte ga-ma790fx & AMD Phenom 9850

if I read the specifications right on your mobo... it implies that it has the 4 pin PCI-e input(power) but it also has the 8pin ATX power conector. (it may be simply removing a cap that is actually right next to the 4 pin connector, thus making it an 8 pin connector (thats how it was on my mobo)

Try using the 8pin power with your new PSU, see if that works.

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I'm interested in the Toshiba G25 laptop but have heard that you can't use it on airplane seat power. It comes with a 120W AC power supply (15Vx8A), but I've been told that most airlines limit seat power to 75-90W max. Lind sells a 12V car adaptor for the G25, but specifically won't include an airline plug for this reason (which I can get independently, of course). I've read some interesting electrical discussions on this board. Can ya'll comment on the following or provide any general advice about power consumption?

1) Given that the voltage of the laptop and airline seat power pretty much match up (12-15V), if the amp draw on the laptop exceeds what the airline power supply can deliver, what will happen? Will it damage the laptop to feed it insufficient current? Will it shut down the laptop altogether? Merely dim the screen?

2) If I remove the laptop battery, which requires power to charge it, how much will that reduce the power need of the laptop? I'm not sure how to work the math, but the spec sheet states the battery supplies 4400mAh at 8A output. Does it require the same to charge it?

3) Most importantly, on my 15 hour transpacific flights, will the DVD player work with that ultrabrite screen at the low airline power supply? A nice feature of the laptop is that you can watch DVDs without powering up the Windows operating system (it has a small linux OS for the DVD player). Granted, the DVD drive and screen are prob... Read more

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Yesterday in my house,electric fuse was switched to turn on cooker in my kitchen. During this power delivery was stopped for 4-5 second only.
When power back on then pc automatically turns on and just before bios show me :"?Power supply surges detected during the previous power on ASUS anti-surge was triggered to protect system from unstable supply unit.
Press F1 to continue.? And then pc booted fine to Windows.

Is this normal ? Did it damage something? Why i get that message is this normal?

6700K stock
Asus Z170-P
Corsair 750 RM
Gtx 1080
SSD 1x

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Hello: Just received a beautiful W530 Laptop - love the T and W versions of this machines. However, with such a large power requirement, want to make sure that I will be able to run and charge the W530 on United Airlines, American Airlines, etc., using the supplied 170 W Power supply...  Please confirm your experience that this will work. Otherwise, using this laptop on long haul flights will not work. 

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It's been a while since I built a system from scratch and have a... errr... simple question

gfx: Sapphire HD3850 512MB Ultimate (passive)

MB: MSI P35 Neo2 FIR

PSU: Seasonic M12II 500W

The motherboard has a power connector for the graphic card next to the slot.

Is there any reason I should connect the power for the card to the power connector on the board instead of directly to the power supply?

A:Graphic card power to power supply or connector on motherboard?

First time I have ever seen that feature. I like it. I'm thinking that is a neat/easy way to partially eliminate cable clutter from the PSU. Give it a shot, you can always revert to PSU cable if you wish.

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I have a Sony VGC-RB42G computer. I recently moved my computer, cleaned off all the dust, and when I plugged everything back in, it won't power up. The light on the power supply blinks green, inside the motherboard also has a green light that blinks as well. It has a ticking sound too, but I am not sure if it is coming from the power supply or the motherboard. Any idea what could be wrong.

FYI, I have already unplugged everything from the power supply, pulled out the ram, checked the battery, and put everything back together and still no change. One thing I thought was strange was after I unplugged everything, I pulled the power into the power supply again and this time the green light came on but did not blink. It stayed solid.


A:No Power, Blinking green light on power supply and motherboard

Sounds like a Power Supply problem.

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Hello guys.  Can anyone help me understand the power supply on the HP Envy Phoenix 860-019?  The PCIE connector 6 pin connected to the GTX 960 has black and white wires.  Shouldn't there be yellow and black wires?  Yellow is usually 12 volt and black wires ground.  Is the 6 pin connected to my GTX 960  supplying a standard 75 watts of power or something else?  I want to install a GTX 1070 but the 6 pin wire colors are not the industry standard color scheme.  Also there is a 2 pin power connector with a white and black wire.  Usually a 6 pin and a 2 pin can be used together to connect into a 8 pin socket on a GTX 1070.  Will my connectors supply the needed power and connect properly because the color scheme on the wires make no sense. Thank you

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I've recently inherited a lovely Y70-70 touch from my father, and have restored it to factory settings recently. However I'm having issues at the moment where it shuts down instantly at random times when not plugged in. Checking the system logs in the event viewer I see the following Critical message: The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly. Generally online help seems to suggest this is a power supply issue. Have I got a duff battery in here? Are there further diagnostics I can run? Unfortunately I'm out of warranty so keen to solve this myself!

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