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Y400 Power Off when unplug power cable (Battery still attached)

Q: Y400 Power Off when unplug power cable (Battery still attached)

my Lenovo Y400 is facing a problem. The battery is charging, but when unplug the power cord, the laptop lose all power and off. i thought battery problem but after replaced, it is still the same.Seems like the laptop just won't draw power from battery. i suspect i overheated parts of my laptop, since the left speaker which is near the heat exhaust not sounding well.The power plug point is also at the top left side, i wonder will it have anything to do with not getting power from battery?or are there other possible cause?

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Preferred Solution: Y400 Power Off when unplug power cable (Battery still attached)

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So I had no such problems until today. It happened instantly. Even though my batter is full, whenever I unplug my charger the laptop shuts down instantly. And when I turn it back on, the orange battery light on the right side flashes quickly. Someone had told me that the battery was dead or I had to replace it but it worked just fine until today. I have been using this laptop for almost 4 years now. Thanks for the suggestions and help.

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After shutting down, my computer will not power-on again unless I unplug the power-cord, then plug it back in (or use the psu on/off switch).

I have tried changing PSU, same thing happens.

My guess it has to be related to my motherboard.
I have the latest bios. I have reset the bios.
This happened after upgrading to a opteron 180 cpu. But I'm not sure if its related.
I have tried disconnecting the RAM, harddrive, graphics card to no avail. Also tried refitting the power-button cables.
Computer is rock stable once its on ...It powers on fine if I switch off the PSU with the button that is located on the psu, or pull out the power-cable before turning it on.

Any ideas what might be causing this?
Epox 9npa+ultra motherboard, amd opteron 180 (939), win xp sp3, 2gb ram

A:computer will not power-on unless I unplug power cable first

Unplugging the power supply, or disconnecting from the source allows everything to reset in the power supply and on the motherboard. This situation is most always associated with a defective power supply.

Since you have changed the power supply and the condition persists then the problem almost has to be a fault in the motherboard POWER GOOD circuitry.

If it were my machine I would just get in the habit of turning off the power supply after use, and live with it. Unless the problem is something obvious such as a "bulging" or leaking capacitor, chasing a problem like this is like chasing ghosts.

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I am in the process of removing the CD-R drive from my Dell Dimension 8200 so I can install a Plextor 712 DVD drive, and I can't unplug the power cable. Is there a trick to this, or is it just a matter of my not having enough strength in my hands (old lady)? How far dare I go--for example, should I try to pry it out or use pliers on it? Can I wiggle it hard? I am afraid of breaking it or bending pins.

This is only the second time I have done anything inside a computer (the last time I successfully installed a CD drive in a Compaq), so I am really a newbie at it and don't know what to expect. Any help appreciated!

A:Solved: Can't unplug power cable to CD drive

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Hey guys, I'm new here; I'm having a problem that is bothering me, I recently installed windows 8.1 on my alienware 17x R2, the problem is the laptop never shutdown and still running !, also when I unplug the power cable then plug it back again the windows freeze ! , Note that the battery on my laptop is nearly dead; I wasn't have a problem like this with windows 7, please advice, thanks

A:Windows 8.1 Freeze on shutdown and plug/unplug power cable

Right click the battery icon in the taskbar. Then, click power options. Then choose what the power button does. Click Change settings that are currently unavailable. Finally, uncheck turn on fast startup.

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I am in the middle of a computer nightmare.

My old machine was semi-stable and a random freeze could not be resolved with a new system install.

I decided to replace the video card, mobo, processor and ram. My hard drive is only a few months old and the problem had been showing up before it was installed.

Processor is a P4 3.0/800
Hard Drive is a 160GB/7200 Seagate
CD ROM is a Benq
Power Supply is a Vantech Stealth
RAM is Kingston PC2700 333
Graphics is NVidea FX5500 VGA

I can't get any video signal or POST info.

I have tried running the machine with just the CPU and RAM.

There is a very odd problem. The Hard Drive or CD-ROM will power up if there is no IDE cable connected. If I plug an IDE cable in neither will power up.

I have tried using only the cd-rom or only the hard drive, jumper settings and a different IDE cable. Same problem. The IDE cable is keyed, so I know it is not in backwards. I have also tried both IDE mobo connections.

I have tried clearing the CMOS both by jumper and by removing the battery.

I have both power connectors connected to the MOBO.

I am using a USB mouse and it is not lighting up. I am wondering if this could possibly be a PS issue - except the PS worked fine in my other system and the CPU fan does power on and spin. I am wondering if the slots (VGA, USB, etc..) on the board are getting power.

There are only two jumpers on this board - the CEMOS clear and the bus speed select. I have tried the bus speed in... Read more

A:Drive will not power on with IDE cable attached

Last night I removed the MOBO from the case and tried building it on top of my (glass) desk. No luck

Tried a new power supply. No Luck

Tried a PCI video card (no luck - although the fan on the card is spinning).

Tried a wired keyboard (PS2) and a usb mouse in both the USB slot and with a PS2 adapter. No Luck - although the keyboard flashes at powerup, the USB mouse doesn't light up.

Tried getting to POST with just video, ram and kb/mouse. No Luck

I am fresh out of ideas and am ready to toss a brand new P4 300. Could someone please help?

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OK I am having a little problem I just purchased a new mother board (EPoX) and processor (P4 3.0) the problem I am having is when I turn on the computer all the fans start up but the hard drive will not spin ( the hard drive is working fine in my other computer) but in the new system when I unplug the ATA cable it starts to spin (also there is no signal to the monitor during any of this . If anyone has any suggestions or a solution please let me know.

A:No Power to ATA Hard drive when ATA Cable is attached.

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Hi all

I'm using a thinkpad T60. I think my battery is out, I've been checking it through the ThinkVantage and it said battery ok but should discharge and recharge. I did that and it was ok for a few weeks but power gauge always says 80%-90% and less than a hour, it goes into hibernation.

Now, without AC, my thinkpad can't be switched on. I leave the ac on while the battery is still attached to use it. The battery icon is orange and blinking. When I've shut down, I remove the ac plug. I've never removed the battery before since I've used this thinkpad 4 years ago.

Is this harmful to my thinkpad, all my data and stuff?
I'm reluctant to remove the battery in case dust gathers around the exposed portion. I'm also reluctant to buy a new battery as I'm thinking of getting a new netbook, those 10" type of laptop.
What's the best way to manage and keep using this thinkpad without a new battery, or is it a big NO NO???

Please help, I'm not very IT savvy. Thanks in advance!


A:Can I leave a bad laptop battery attached while using AC power?

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Recently my laptop has been acting up, about a week about my laptop started to not want to charge. At first i thought it was a problem with the chargers/AC adapters i had but they've been working perfectly fine and one is a recently charger i bought from amazon to fit the model of laptop i have, making sure everything is compatible. I came to the conclusion that it's not the chargers/AC adapters but the battery itself, so did some searching around to make sure i find what's right and i found a battery which is compatible with my model. The battery came and i installed it, making sure everything was left how it should be, everything is properly connected. I turnt the laptop on and it worked but when i tried to charge the laptop with both of my chargers but it wouldn't work. In the end of it all i think i need a new DC power jack cable or could is be something else?

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Hi, i have a old lenovo 3000 Y400 notenook.  Bought it from malasyia and its around 7 years old. my laptop fell and it case broke, hinges broke. But it still worked perfectly fine. this was 2 years ago, i checked it after every few months and it still worked. but i bought new laptop and sort of packed it in a pizza box, as screen had no casing and lower body was damaged as well. 4-5 months ago i removed the laptop HDD and started using as external HDD. finally found 2nd hand body for my laptop, cheap price, so decided to get the laptop fixed. BTW i bought new charger and battery few months before the incident. and also everything was working fine before i took out the HDD as i booted the device and checked. But now it won't boot. it shows power light, but as soon as i press power on button power indicator light turns off and it comes back on after few seconds. i have tried without battery, removed all possible connectors and its just abre minimum like motherboard, RAM, HDD and power switch panel to turn on power. Still same, on motherboard i can see few more lights, 3 led lights that turn on and then off in few secods span. Could it be because of dust? or something esle? because i really doesn't make sense to sped money on repairing it, because getting the 2nd hand body is the last viable option after that its better to buy 2nd hand laptop then spend money on it as it would cost me the same amount.  any suggestion or help would be appreciated. i will ... Read more

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I have a strange issue. I have a Lenovo T60 laptop and I am experiencing problems with the power management/power guage.

It will often show the battery not installed (power gauge is a greyish-white color with dashed lines) or it shows a red X. It does not matter if I am on AC power or on Battery power, it will show the full range of power, battery level, not installed, or an error.

I have searched Lenovo's site and I seem to remember seeing an FAQ about this, but now that I need it, I cannot find it.

What can I check or do to stop this? While it is annoying, I am not sure if I am having a battery problem or not. I did check my battery on Lenovo's site to see if it was recalled and it is not.

I do appreciate any help that any one can give me.


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I've recently started working at a new company and I've been provided with a brand new Latitude E5570. After 3 days use the laptop has started to shut down when the power cord is unplugged, it was working fine yesterday but having returned to work this morning I've found that I can't use the laptop unless it is plugged in (it wont turn on if the cord is unplugged). I've tried using a different power cable from a colleagues laptop, but the situation did not change. I've also tried changing and resetting the power plans to default, but to no avail.
I ran a battery check through command prompt and it showed that the battery is working fine with 100% charge, so I cannot understand why it refuses to work without the power cable. Here's a link to the report (must be opened in a browser): https://www.dropbox.com/s/ezwtuiowx0kz4gb/battery-report.html?dl=0 

A:Dell Latitude shuts down instantly when power cable removed (despite full battery)

The charging circuit on the motherboard is probably bad.  That allows the battery to accept and provide current. When I worked in a previous job years ago supporting hundreds of laptops, we had a few of these. If I'm right, I suspect that as you wait for your battery to self-discharge over time, you'll find that it battery won't charge anymore either.

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I'm having a bizarre issue where simply unplugging the official Lenovo power supply from the orange USB power port causes the laptop to immediately issue the subject warning, along with the detail "A USB device has malfunctioned and exceeded the power limits of its hub port".   This warning pops up every 5 seconds, unless clicked on, where reset/close options do nothing.  Crazy thing is, NOTHING is plugged into any USB port!   Reattaching the power supply does not clear the error.  Only rebooting with the power supply cable connected clears the error.   Remove the power cable, and the error instantly comes back.   All of the USB ports actually work fine, including the USB C port, whether or not this message is active. Maybe it is a hardware issue, but ALL the USB ports actually work fine.  I can't figure how unpluging the power source can trigger a USB power surge when nothing is actually connected and the battery is fully charged.  I've removed/reinstalled the USB Root hub, eXtensible Host Controller, Generic USB Hub, etc., drivers multiple times to no avail.   No errors with any devices are apparent in the device manager. I've seen a lot of issues reported about USB power surges but none like mine.   Anyone have any ideas about this?  System: Lenovo Yoga 900/16GB/Windows 10

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Goodafternoon, I need additional (451-BBVQ) Dell Portable Power Companion (12000mAh) PW7015MC USB-C Power Out Cable but unable to find it on the parts page.

Where is it on Dell's site? Just the Power Out cable, already have the battery packs.

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hi all,

I'm in a bind, and a friend referred me to this site, where I might be able to find some decent answers.

I run a small computer store in my hometown, and I was fixing a Sony Vaio PCG-FRV35 Notebook, It's fairly old, p4 with 512mb ram... But anyway, I was just removing spyware and viruses from it, and finished that up, then he said his sound wouldnt play, i started by reinstalling drivers and all that good stuff but it didnt play, I decided to lookinto the notebook to see if the speaker wires were connected and everything was fine there...

I pried off the faceplate for the powerbutton and LEDs and everything thats just above the keyboard, and I saw a ribbon cable connecting the power button and speaker circuit board to the motherboard, so i carefully unhooked it and put it aside, after finding no problems I rehooked it back up and tried to turn on the computer again... no power no post no sound nothing. It's like the power button is shot now. I've troubleshooted for 3 hours already on it, tried a multimeter to check to circuit connections, tried _everything_

I have no idea what to do now, this guy want's his laptop so he can work with it, and I dont feel like having to replace a laptop... this is like a techs worst nightmare >_<

Any advice would be greatly appreciated, is there any known issues were these power ribbons?

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I've got a computer that's turned off. I press the power switch, and nothing happens. Now, I unplug the network cable and the computer turns on.

Why does having a network cable connected prevent the computer's power switch from functioning? And why does unplugging the network cable cause it to power up?

The computer has worked fine for a year, but was recently moved to the other side of the room, and a new switch replaced the old network hub at the same time.

A:Power Up Issue: LAN Cable Disables Power Switch?

I swapped network cables and the problem still persists.

Any ideas?

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hi all,

I was fixing a Sony Vaio Notebook, because i was getting a weird error and i cant remember what it was.

I pried off the faceplate for the powerbutton and LEDs and everything thats just above the keyboard, thinking it might be the cmos battery and I saw a ribbon cable connecting the power button and speaker circuit board to the motherboard, so i carefully unhooked it and put it aside, after finding no problems I rehooked it back up and tried to turn on the computer again... no power no post no sound nothing. It's like the power button is shot now.
I have no idea what to do now,

Any advice would be greatly appreciated, is there any known issues were these power ribbons?

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I have a ECS P4.945GCT-M/1333 (3.0) 775 mATX Motherboard and I installed Intel E2180 cpu and put memory stick on it. The computer won't boot - the cpu fan moved a second when I plugged in the power, and the stopped. If I disconnect the auxillary power cable, the CPU fan just can start, but of course it won't post. If I also disconnect the cpu fan, the power supply fan starts and I can see keyboard lights turned on for a second.

I measured the power on auxillary cable and it is ok: 2 12v and 2 GND. I am pretty sure that the power supply is good: I put on another power supply there and it is the same thing.

A:Computer won't power on when auxillary power cable is connected

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Hi, Friends am using Windows 7 ultimate 64bit.everytime it's saying some updates are available and once I did the updates when am shutting down the pc its keep on saying ' Please do not power off or unplug your Machine installing updates; Really annoying me please help me fix this issue


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I am running Vista Ultimate 32bit, I started getting this message yesterday and it says " Installing update 1 of 4 " and I havn't seen anything happening at all, what do I do or what is going on?

I would like some help please.

A:Please do not power off of unplug machine

Originally Posted by Coco107

I am running Vista Ultimate 32bit, I started getting this message yesterday and it says " Installing update 1 of 4 " and I havn't seen anything happening at all, what do I do or what is going on?

I would like some help please.

Hi Coco,

Does the circle animation keep spinning while its updating?

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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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Hello, this is my second post on this website; and I hope I'm posting in the correct category.

Here's the problem I'm having and I hope someone can help.

I've just repaired Windows XP and its now booting up great!, however, the battery icon (in the bottom left) has a symbol, the icon showing is a "plug" as if my laptop is plugged in and it never shows how much battery life I have, weather my laptop is plugged in or not. I know my battery isn't failing or is damaged because I checked it with another hard drive that has windows XP (and with Dell Diagnostics) and the battery icon shows up normally (i.e. showing me how much battery life I have left).

I've been reading up on this and I think Windows XP's "Power Manager" thinks or act as if I'm on a Desktop when I"m on a laptop. Please Help! lol

A:Windows XP Power Icon Battery Power Status Not Showing

Hello -Did the battery Icon ever work when you were in "Malware Removal" forum with Elise ??Please list your Dell model -Thank You -

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Am new here but long-time Windows uses since Win95.
Currently have a DELL E6530 and it gave me a BSOD Event 41 Error while on batteries! Looking around Google and other forums, this transpires to be a PSU related problem, but it's a laptop, and was running on batteries at the time the BSOD happened. System was idling at the time. Running Win 7 Pro 64, as supplied by DELL.

Thanks in advance for any input...

Kind regards

A:DELL E6530 Event 41, Kernel-Power on battery power

Follow the instructions here: Blue Screen of Death (BSOD) Posting Instructions

Without dump files, nobody can help you as to the cause of your shutdown.

The kernel power event ID 41 error occurs when the computer is shut down, or it restarts unexpectedly.

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In November 2013 I began seeing this message on the screen every time I shut down my Windows 7 Dell Inspiron desktop: "Please do not power off or unplug your machine. Installing update 1 of 1.." The screen holds that message for about three minutes and then the PC turns itself off.

Windows Update indicates that an "Important" update has failed to install: "Internet Explorer 11 for Windows 7 for x64-based Systems." This update is 56.3MB and was published 11/11/13.

I disabled antivirus and tried installing the update, no luck. Ran Windows Update Troubleshooter, it found four errors which it could not automatically correct, see attached screen shot.

Below is the data generated by TSG SysInfo:
Tech Support Guy System Info Utility version
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM)2 CPU 4400 @ 2.00GHz, Intel64 Family 6 Model 15 Stepping 2
Processor Count: 2
RAM: 2037 Mb
Graphics Card: Intel(R) G33/G31 Express Chipset Family, 256 Mb
Hard Drives: C: Total - 305195 MB, Free - 221749 MB;
Motherboard: Dell Inc., 0RY007
Antivirus: McAfee Anti-Virus and Anti-Spyware, Updated and Enabled

Any thoughts on how to successfully install the update? Or perhaps reset it so Windows can start over on it? Or something else?

A:Solved: Please do not power off or unplug your machine

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I've been using Wake On Lan for few years without any problem on my W7 x64 and an Intel 82567LF-2 Gigabit controller inside the motherboard.

Now since few weeks, it doesn't always work. Sometimes I must unplug the power cord (when PC is off) and re-plug it. Then, sending a magic packet (by another computer on LAN) works and wake it up.

I had seen this behavior also few years ago but very rarely and I though it was because of static electricity accumulated on power circuitry (please note that I have an external laptop-like AC power adapter). Now it becomes almost systematic. That is every time I want to wake it up I have first to unplug re-plug the power cable on the back of the PC (I unplug the cable from the 4-pin DC power port).

What is this problem ? Did anyone experience this kind of behavior ? any solution ?

In the case my BIOS settings have been altered (which doesn't explain why it works after unplug/re-plug of the power cable), would you remind me those settings (don't remember the states S4 or S5, ...).

Also on my Intel card properties, I have enabled "Wake on Magic Packet". But there is also "Wake on Magic Packet from power-off state" that is not enabled. Should this be enabled ?


A:WoL needs to unplug/replug the power to work!

Is your computer a desktop or laptop?

"Also on my Intel card properties, I have enabled "Wake on Magic Packet". But there is also "Wake on Magic Packet from power-off state" that is not enabled." Where are this settings, on BIOS or under Windows?

There are many questions and answers here intel 82567lf 2 wol - Pesquisa Google

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My Ideacentre 700-25ISH desktop if 4wks old. It started having power problems yesterday. The computer won't turn on when I press the power button, no fan no LED, no noise at all. Based on a few suggestions I found online, I had to unplug the power cord and press the power button for at least 30 seconds (10 seconds won't work), then it will power on like normal. I also notice leaving the power supply unplugged for a few hours also did the trick. Does anyone now what's going on? I just updated the bios yesterday and that did not help. core i7-670016GB ram120GB SSD + 1TB HDGTX 960 2G ramhooked up to my monitor with miniport->vga adapter cableThanks in advance

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I have a dual booted mac / windows 7 machine. About 3 hours ago I logged into Windows did some invoices then logged out to get back to my Mac. But I got the please do not power off or unplug your machine. Installing update 1 of 9 ..

I waited twenty minutes, because updates are usually fast. The message never changed. I went to the grocery store the message had not changed. i went to the gym, it still hasn't changed.

So now my question is... What happens if I power off or unplug my machine? Or should I keep waiting. I do have another Windows 8.1 / Ubuntu machine I can work on if it is just an especially large windows 7 update.

A:Do not power off or unplug your machine... 3 hours later...

If it was my computer I would reboot into Windows.
A few times I have had that happen to me and a reboot fixed it.
You should notice on the reboot Windows will be finishing off the updates. Wait until it's done. Normally it's pretty quick at that point. When it's done booting I would check for more Windows Updates.

Of course its your computer so its at your own risk.

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Hi, I have an Acer V3-772G which I have had from new (Semi New from Amazon, warehouse cosmetic damage), Have never experienced any issues with powering on/off/charging until recently. Here is where I am up to; Laptop will power up from the battery.Laptop will not power up with cable alone (Battery removed).When powered up with the batter inserted ? the laptop will (according to the battery monitor on the laptop) charge the battery, however, the battery continues to discharge and the laptop will eventually run out of charge.When the power cable is inserted whilst the laptop is powered up, the laptop recognises that the cable is connected and will enable the "Plugged in" power settings etc. If I then remove the battery, the laptop powers off.Laptop seemingly charges the battery when it is powered off, however, even after a full night plugged in the battery doesn?t have the charge to start the laptop.Both the external cable and the battery are in perfect working order (Having tested both with a separate Acer laptop).I have opened and cleaned all connectors / fan / CPU / GPU inside the laptop and nothing looks out of place.All USB / Optical Drive / HDMI ports ETC all work without issues. I?m assuming a cable issue and not a main board issue because there are no other faults besides the DC cable (Battery will still power the laptop etc.). I have ordered a replacement 120w internal DC cable from the spare parts website to test my theory. In the meanti... Read more

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Hi guys
I have a problem with my medion mt6 desktop pc.
While running a game i accidently dislodged the power cable and now when i press the button the screen recieves no signal.l also when i press the button again it powers down like ive pulled the plug. I have tried a new screen but no luck. Also the motherboard was recently replaced by medion but it worked fine for about 2 weeks. What is wrong and is it software or hardware?

A:Computer won't power on after pulling out power cable

You need to go into 'device manager' (which is a part of your Windows program). Click 'start menu': choose 'Help and Support' icon. Type 'device manager' in the 'search box'..print out the instructions. If you are new to troubleshooting your computer: print all instructions. It will save you a lot of time and mistakes. Look at the device manager screen, click on 'monitor', then 'properties'. Next do the same on 'display adapters' This will tell what's not 'operating properly' and whether it's the driver's. 'Help & Support' has much help to offer...but not all the answers by a long shot. Good Luck.

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Hello everyone, I am new on this forum and I have an issue with my motherboard, the issue is as follow;
1- When I connect the 4 pin ATX 12v to the motherboard everything stop nothing works, the CPU fan stop working and everything else, The Motherboard brand is FOXCONN 865A01, even I change the Power supply and still have the same issue.

I would like if someone can show me the right direction on how to fix this issue.
Thank you in advance for any help someone can give me.


A:4 pin atx12v power cable causes power short

1. Welcome to Tech Support Guy
2. The usual cause of such an event is either
A. a defective motherboard - unlikely but could be
B. If this is a new build - a build error and the motherboard is shorting across a ground fault when that power is connected
C. You are using the wrong connector or connecting it on the incorrect orientation - eg the clip is not the correct way on the motherboard header
D. CPU error - bent pin on insertion of CPU

3. Please post some more detail of
is it new build
CPU details
What checks have you made if new build
Re 865A01 - which one please there are variants

4. I presume now having looked at the board it is NOT a new build, so when please did this first occur
and what problems were seen first, if any , before this
Most likely cause now, as I think the system is of some age is the board or the processor, if you refer to the 12v aux power

ATX 12V Power Connector: CN11
The 4 pin ATX 12V power supply connects to CN11 and provides power to the CPU.

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Hopefully someone here can help solve my issue, because I'm practically at my wit's end with it. I recently ran Lenovo's Updater program and it installed a few new things on my Laptop... I don't remember all of them, but I know one was a BIOS update, a Firmware update (can't remember specifically for what though), as well as a few programs I was missing on my computer (like Lenovo Power Management, just to name one).  It's something I hadn't ran for a good year, so I'm sure everything was using an older version! In any case, it seems after I did that, many of the games on my computer started playing worse.  Long story short, after checking out a few programs to monitor what my computer's doing (CPU-Z, and even Intel's Extreme Tuning Utility), I noticed that my Laptop's suddenly only using a portion of what it can do. For example, the core speed should be able to go up to 2.6ghz - 3.3ghz... but strangely, it's staying at a solid 1.20ghz the whole time. No matter if I run any graphic-intensive games or do anything else that might need some extra power, it stays exactly at that number. Here's the weird thing though.  If I unplug my Laptop and let it run off the battery?  It shoots straight up to the 2.6ghz-3.3ghz, as it's supposed to.  As soon as I plug it in again, it drops right back down to 1.20ghz and many of my games run like crap again. I've tried looking up solutions online, but I've found nothing that helps. I've tri... Read more

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Hey there.
A while back I was getting a lot of blue screens and on occasion artifact crashes which led to my machine death.
I'll turn it on, the fans start spinning, and usually the pc speaker will beep and POST will start, but no longer - it simply turns off. A few seconds will go by and it attempts to start up again by itself, but just continues this process.
I thought it was the motherboard, so I bought a new one but no luck.
I then bought a power supply (700W like my other one), but again no luck.
I've done combinations of these items, and it seemed to always work and start up once, but never a second time. I soon realized that the trick was unplugging/replugging the power supply. Then it will start up once.
I suppose I can live with having to unplug/replug the cord as necesary, but don't understand this problem at all. Apparently its not the motherboard, or the power supply. I'm starting to point my finger in the processor's direction, as I can't find anything else to blame.
I've read somewhere that the motherboard retains a charge, even when turned off, unless the power supply is unplugged. I'm thinking this might have something to do with it.
Any ideas why this problem is occurring?

My last attempt was the new mobo/ new power supply combination, and I also noticed, upon a successful POST, that it was reading my Q6600 (2.4 mhz) as 266x8 (2.13 Ghz). But I'm not sure if this is relevant, and wonder if that may just b... Read more

A:No POST unless unplug/replug PSU power cord

Make sure you have plugged in the power connector near the CPU socket properly. Its either a 4 or 8 pin

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I'm on a laptop, and when I pull out the power cord, sometimes either my LAN or wireless network connection gets disabled. Does anyone have any idea why it disables my network connections when the unplugged power cord gets detected? Thanks.

A:LAN randomly disabled on power cord unplug

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hi i got hp dv 7 installed all drivers from hp site its all good as long i got the power plug connected but when i unplug the power plug and run the laptop on battery the graphic setting change pop up comes and youtube or any video that i watched oges slow even the net? so what could be the problem ?
just to mention if i plug the power plug back it goes back to normal again

A:graphic problem when unplug power plug

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Please help me, my HP go to sleep when I unplug the power and also hibernate on battery when booting upAt time if I increase the back light to the maximum it will run normal but battery will run down fast. I have format it and have been using it with out installing the VGA driver for 4 days it work normal but as I just install the display driver the system go to sleep, so I run restore from safe mode it work normal because the display driver as been uninstall. Some one should please help me on what to do. Please is this hardware or software issue. Mind you I am using bios update F. 60 because of this issue still same thing.I have hitting driver from both HP and Intel but still same thingI need help fast on this issueIf there is any driver or hardware let me knowI have go into the device manager and right click on the keyboard driver properties: I can't find the power management bar.

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Now the laptop DELL 9400 is saying I cannot defrag because the battery is too low. But I dont use the battery at all. I always use the ac adapter cord.
Is there a setting to address this issue, or is this a hardware problem?

A:Using AC power but laptop shows using battery power

Turn off the laptop, remove the battery and then start up again (with the AC power attached of course!). Do you still get the problem? Or does the laptop not turn on at all?



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I purchased a Lenovo 110S a week ago. I?ve found that I have issues turning it on sometimes whereby the power indicator flashes a few seconds but the laptop doesn?t power on. This happens with enough battery power, for example it?s happened when I have had 50% battery power remaining. I plug the laptop into mains AC power and it will then power on.  But im stumped as to why this doesn?t happen all the time. If anyone can offer help it would be appreciated! PS: my battery is a concealed one ie; in the laptop casing with a cover that?s screwed on.

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Hi. Im new on this forum, but I have a problem with my Inspiron 1545 laptop from Dell pre-loaded Windows 7 Home Premium 64-bit (although I did re-install several times with OEM OS restore disc). Money is tight for us now, so my AC power jack on the side of my laptop (or the end which connects to the jack) is damaged. I don't know what it is or how serious it is. Once for a while we had to protect the cord from slipping out using duct tape. The only thing I really know is that the coded white rim on that end of the cord, a very small part of it is chipped. And my battery needs replaced, do I need to still fork over an expensive sum for a brand new one?

A:Broken AC power jack, no battery power, help

Hi CSean and welcome to SF
As I understand it, it's not the Laptop-side of the connection that's broken right?
In that case you might find this link helpful:

Amazon.com: Replacement Plug for Dell Inspiron 1525 1526 1545 Laptop Ac Adapter: Computers & Accessories
Granted those aftermarket replacements are not necessarily in the same quality as the original parts.
You often trade off quality for price.
These seem to be original parts (for 3-6x the price as it seems):

Hope it helps you further

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I've recently built a new PC and triple checked that all parts were compatible. When I turn the system on, it runs perfectly fine (including the graphics card fans) but displays a box saying "Power Save Mode" on my Lenovo monitor. When I unplug the PCI-E plug from the Graphics Card and turn the PC on, It boots normally and is fully functional, booting into Windows 10 as intended. How might I fix this?

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I've been having issues with a Thinkcentre M72e tiny lenovo that keeps shutting down and won't restart unless I unplug it from outlet and plug it back in.  There isn't any error codes and I've run lenovo diagnostics and everything passes.  I looked at the diagram and it appears that there isn't a power supply in the case which was my first thought for replacing.  Has anybody had this issue and if so, what did you do to fix it?  Thanks!

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My laptop was fine a few days ago but now when I plug it into the wall ac power the laptop will not turn on at all no noise. However when I plug the power cord in I do get a light for the battery charging,(yet to see if battery will take a full charge and come on) but so far nothing. Any ideas as to fixing this or why this could happen. can I get files from laptop harddrive to my pc? Remove laptop hard drive and connect to my pc? Thanks

A:No Ac Power or Battery power to Laptop

Sounds like a major failure in the laptop.

You can buy adapters for laptop HDD to Desktop IDE drives, quite cheaply. That will allow you to access the files on the hard drive.

USB cases are also quite reasonable for laptop hard drives and give an easy way to access the drive.

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After my friend's laptop wouldn't run on battery power OR charge the battery I tried many "fixes."
Shockingly none worked that I found.
Only one thing worked for me to my surprise.
A last ditch effort was to open up the laptop (sony pcg-81114L) and disconnect the cmos battery for a few minutes to reset the CMOS.
To my surprise, when powered on, the battery instantly showed it was charging AND when removing the power plug the battery POWERS the laptop now! (and I'd thought I was wasting my time.)
Worked with an off brand battery also.
Many times this has saved many computers that have odd "unsolvable" things wrong with them.
Surely someone else has done this also but I haven't seen it posted anywhere to my knowledge.
Thank GOD for bringing the idea to remembrance!

A:sony vaio won't charge battery or run on battery power (CMOS BATTERY FIX!)

Hi askfault,
Do you have any information on how this fixes the battery problem? would be interested to know.

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My Yoga S1 has contradictory, intermittent power issues that I'm trying to chase down. Culprits are bad power bric/cord/plug or power socket on mother board or power board that feeds into power button/led on. One day it blacked out and wouldn't restart to hard drive or windows stage. I did get an error code which I can't remember 5100 or 5500 poss?, that seemed to indicate the power board or ribbons to that needed replacement or re-attachment. So fiddled with it and it did fire up in windows all ok. Then ran out of power and died again. power button wouldn't light up. plugging in power unit did light up led as getting charge. Left it overnight and then it miraculously charged up. pushed power button light up twice then nothing. took out power board/detached ribbon, then it fired up to windows, fixed some hd errors and has been restarting without problems. Except now there is no plug showing on battery icon when plugged in. So not recharging but I'm sure the battery is good. And logically, the power brick and plug must be feeding electricity into laptop to get it to recharge enough to start up. So power socket and plug may be suspect with intermittent contact problems. Or the power board somehow is involved in this? I've ordered a new powerboard as easy screw in and cheap. My question about powerboard is does this control ability of plug to charge battery? power brick with new plug is next order from ebay. but the power socket, which see... Read more

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Hoping this problem will be noticed by more people, the original post on this issue came from:https://forums.lenovo.com/t5/Linux-Discussion/T470-Linux-Power-Bridge-wrong-discharge-order/td-p/365...https://www.reddit.com/r/thinkpad/comments/63odjr/t470_battery_order_question_internal_discharges/ Brief description: same problem with OS including Win 10, Ubuntu 16.04, Gentoo etc. The internal battery always gets discharged first regardless its remaining power, which is generally harmless but seems not so good for the internal battery life. With my own T470 machine, updated with the latest 1.29 BIOS, this problem remains. According to searching results online, this little bug came with early versions of X's and T' including T460. PS: this issue had been successfully fixed with T460 via BIOS update 1.26, hoping it would be fixed with T470 sooner or later. Best regards. 

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Hello everyone,
I have been having a problem with my laptop recently. A few weeks ago my laptop turned off, and wouldn't turn back on. I did some googling, and found suggestions to remove the memory, SSD, and CMOS battery, wait, then put them  back in and try again. When I did that, it didn't work the first few power button presses, but then it turned on. It has been consistent like that. I have the battery out, and on AC only, when I remove AC and CMOS battery, then plug the AC back in, the laptop will boot after hitting the power button a few times.

Any suggestions?

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This started a few day ago and so far as per now i charge it almost every after 2hours but with 45% still remaining on battery.

A:My dell latitude battery shuts down at 45% of battery power remaining and on plugging it into ac, it starts from that same % so am not sure of what is happening to it.

Thank you for writing to us!
Kindly boot the system into BIOS and check the battery health and Ac Adapter.
Also private message the service tag and email address.

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