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T520 HELP! Will not turn on unless CMOS battery is...

Q: T520 HELP! Will not turn on unless CMOS battery is...

T520 i7The Problem: Machine will not turn on when button is pushed.Steps Taken: New motherboard installed. Machine started up just fine. Turned it off and it would not power up when button was pushed. I unplugged the CMOS battery(the little watch battery) and plugged it back in and the power button works once again. Turn it off again and again it will not power up. If I leave the CMOS battery unplugged, then I can restart the machine, but only after I unplug the power cord and plug it back in; kind of like a reset between each poweroff/power on cycle. If laptop battery is inserted, it will not power on no matter what I do. It will only power on with the power cord. Laptop Battery checks out fine. I tried a new CMOS battery as well.Solution???

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RELEVANCY SCORE 200
Preferred Solution: T520 HELP! Will not turn on unless CMOS battery is...

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RELEVANCY SCORE 70.4

Recently in the process of upgrading my Dell laptop the plastic cover of the CMOS battery broke off. I held the battery back into the casing with a sticker tape. The system worked fine until I took the laptop to work some weeks after. At work I pressed the power button to turn on the laptop, but it wont turn on. Absolutely no sign of power to the system; no power led, no sound or feeling at all. When I noticed some noise inside the laptop, I opened it and behold the button CMOS battery was no more in place.

I got back home and I fixed the tiny plastic that holds the battery to the casing with a little epoxy adhesive, and used the opportunity to replace a new battery. After coupling the machine back the condition remained the same. Any assistance from this great forum would be appreciated to be able to get my laptop up and running again. Thank you all in advance.

The Laptop is: Dell Inspiron 1501, 2GB RAM, 2ghz speed processor, Win 7 installed. I have no reason to suspect the power pack, everything looks fine.
 

A:My Dell Laptop fails to turn on after change of CMOS battery.

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RELEVANCY SCORE 61.6

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.
 
Xen

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RELEVANCY SCORE 58

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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RELEVANCY SCORE 57.6

Unexpected shutdown, no bsod, no warning. Only happens without AC (battery only). I thought it was a bad or damaged battery, so bought a new one. Worked better for a couple days, now back to sudden shutdowns, nothing in the event viewer. Won't boot with battery only after shutdown, need AC to get started again. Older model, bought maybe in 2011.Current thoughts : - damaged/loose battery connection- failing cmos (no other signs, wifi has been flakey though)- failing mobo- other failing hardware ?before I invest any more money in this laptop I'd like to try to identify the real issue. 

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RELEVANCY SCORE 57.6

I guess this is a very old thread, but I am having the same problem with my ThinkPad T520.
The battery is fine, but it will not power the laptop. I'm thinking it may be a pico fuse on the motherboard.
Turning the laptop off for a few minutes as suggested does not work. Taking the battery out and pushing the power button for 30 seconds does not work. Buying a new battery just because Lenovo says my old one is dead does not work for me.
Anyone else having similar problems?
 
Moderator note: post moved from 6-year-old B & G thread to T series forum for visibility.  Subject edited to match content.  Was:  Re: Reset Surge Protector on Motherboard - PLEASE HELP

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RELEVANCY SCORE 57.2

I have just replaced my CMOS/BIOS battery today, as , I have faced some critical problem regarding regular BIOS date/time reset after system shutdown. But I want to know how do i recognize, that my new batter is totally ok or functional.

Battery Meter gadget shows that "battery Not charging"
Is it a gadget problem?

Is there any method available so that I can track that my new installed CMOS battery in PC is working fine?

Please help me.

A:Battery Meter shows CMOS battery not charging

The battery you have replaced is solely there to maintain the clock and other BIOS settings (if you have changed them from their defaults). It will not prevent you from booting your system if it is dead/missing; all it means is that you will have to enter the BIOS each time and make the correct settings and time. This battery is not rechargeable.

Do you still have to enter the correct time, or is the BIOS maintaining this now you've changed the battery?

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Been working fine until a few days ago. When I turn it on it says 163 - Time and Date not set - There is no option in bios to set date Non-System disk or disk error replace and strike any key when ready - Bios cannot detect hard drive So the question is if the RTC Battery is weak or dead can it cause above issues Thanks Chris

A:Question about RTC Battery (CMOS Battery) and System Errors

CWILLIAM83 Hello;Allow me to welcome you to the HP forums!The answer is actually -- yes and no. A weak or dead CMOS battery will prevent the BIOS settings from being saved when you power off the PC. If the default settings work OK with your hardware, then the only thing you would notice is that the clock resets. But, if you customized your settings to see the hard drive, then the default settings might not see it. After you replace the battery, you would have to go through configuring the settings-- again.Good Luck

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I tried to install a battery  update on my Lenovo T520.  The update fails with an "internal error" message being reported.  The battery does not fully charge and now lasts only a few minutes once the charger is unplugged.  The battery is a Lenovo replacement less then a year old.

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RELEVANCY SCORE 56.8

Hi,I have this weird problem with my battery indicator. It doesn't work, shows gray battery and three dashes inside instead of the remaining time. The system (Windows 7) built-in indicator works properly however. When I open the Power Manager, it shows some random, impossibly high number of watts used. Each time I open the power manager, the value is completely different.  I haven't installed/updated anything recently, yet a few days ago when I've started the system, the battery indicator stopped working. Restarting the system doesn't help. What do I do now?

A:T520 Battery indicator doesn't work

Hi Migajek,
 
Welcome to Lenovo Community! And happy to have you here.
 
As I understand that you are facing issue Lenovo Power Manager which is not showing battery status in your T520
Please have a look on the following article
 
Do let us know how it goes.
 
Cheers
Prabhansh_______________________________________________Tap that Kudos button if I helped.If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"!

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RELEVANCY SCORE 56.4

Where did the Battery Status Message go in Lenovo Settings? - the box is empty? It used to display/post status messages on the battery....

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RELEVANCY SCORE 53.2

I have had this laptop for a few months now. I am planning to upgrade the processor. I'm really just looking for a fan/heatsink to combat it's insane heat. Is there even a powerful enough fan, if so will it withstand OC for longer amounts of time. Even 24 hours. Help. To all who have read my request and those who will read this will this be sufficient http://m.ebay.com/itm/262933210164?_mwBanner=1

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RELEVANCY SCORE 53.2

I have had this laptop for a few months now. I am planning to upgrade the processor. I'm really just looking for a fan/heatsink to combat it's insane heat. Is there even a powerful enough fan, if so will it withstand OC for longer amounts of time. Even 24 hours. Help.

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RELEVANCY SCORE 53.2

I have had this laptop for a few months now. I am planning to upgrade the processor. I'm really just looking for a fan/heatsink to combat it's insane heat. Is there even a powerful enough fan, if so will it withstand OC for longer amounts of time. Even 24 hours. Help.

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RELEVANCY SCORE 52

Question : Does anyone know if a "faulty" CMOS battery (the CR2032 type) can stop a laptop working?

This is the sequence of events: -

1. Booted laptop from standby as normal.
2. Logged in
3. Everything working as usual for about 30 minutes

Then I stopped working on the laptop to talk to someone. While we were talking I noticed the laptop screen suddenly went blank. From that moment forth the little darling has been as dead as the Christmas turkey.

My experience with CMOS batteries that are about to go play a harp is that they indicate this by displaying the wrong date and time. Even then it can take days or even weeks before the battery finally gives up.

I used my last CR2032 a few days ago, so before I go trundling down to the shops I would be grateful if anyone could tell me if a "deceased" CR2032 can make a laptop suddenly die.

I haven't seen that before.

TiA

T.
 

A:CMOS Battery.... perhaps ?

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I do not see a Cmos battery obviously its there somewhere, If it doesn't look like a large watch battery what else does it look like, I see nothing that can be popped off and replaced.
 

A:Cmos Battery??

Some older motherboards had a barrel shaped, blue backup battery soldered to the motherboard. That was common with 486 systems. In order to replace it, you were required to attach an external battery to a specific connector on the motherboard and set a jumper (maybe) to disable the original battery.
Another possibility is a CMOS ram chip with the battery built into it. Those usually were a large black chip plugged into a socket on the motherboard with "DALLAS SEMICONDUCTOR" printed on it.
 

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My CPU clock was messing up constintly on my so I wanted to change out the battery. I did that with no difficulty. When I restarted my computer all that happined was that it beeped at me the code was.. 2 quick then 9. My computer is know a fancy paper weight I can't even boot from a disk, cd or floppy)There is no signal going to the monitor I have a Matsonic Ms6260s motherboard.
Help!!
 

A:CMOS battery

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Hi guys and gals, quick question. I have a HP Pavilion G7 laptop that was giving me some cmos error messages so after some ridiculously rigorous searching, I found the battery. My question is, does the numbers on the battery mean anything? Meaning, ive found HP pavilion Gy batteries on line for sale but the numbers on the sticker on the rubber housing dont seem to match. Im wondering if that is just the warehouses part ID. This one says, "1126. 12." If anyone is familiar with these please let me know. Thanks

Bob
 

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I was having a problem with the computer keeping time while it was shutoff. I installed a new cmos battery and the time is still not keeping when powered off. Any suggestions.
 

A:CMOS Battery

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I just tried to install a new battery and broke the spring clip part of the socket. Is there a remedy? TIA, Brian
 

A:Cmos Battery

Unfortunately there really is no easy repair for this. It would require desoldering the old battery socket and soldering a new one in. While this is not rocket science, it does take great care and some skill to do. A minor slip or laving the soldering iron in place too long can do some real damage to a motherboard. It is best left to a technicial with the proper equipment and skill to do. I would consult your local computer shop about this repair. And it may take a referal to someone else.
 

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It's time to change the battery (first time for a machine I bought in 2004 - not a bad run). I can't get the old one out....any suggestions?
 

A:CMOS Battery

On side should have a metal contact.
You need to carefully pry it toward that contact as it is spring loaded,
then lift from the other side.
Should pop right out.
Be careful you don't want to break the socket.
Some older cmos batteries were soldered on,but I haven't
seen that since around 2000.
 

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RELEVANCY SCORE 52

Do I have to do anything after changing cmos battery? 

A:Cmos battery

Assuming that the CMOS battery was already changed, it would be wise to enter the BIOS, check the time & date and then set the BIOS to defaults, save and exit.

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RELEVANCY SCORE 52

could someone tell me where the cmos batter is in a dell inspiron 3800
 

A:cmos battery

Welcome to TechSpot! Hope you'll love this place as much as I do.

If you haven't already done it, then open up your case and look around on the motherboard for a shiny round thing that's about 1.5cm in diameter, pull it out off it's socket and there you go.
It should be near your PCI-ports or near your CMOS-jumper.
 

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Hi can someone help please I need to replace the CMOS battery in my laptop but have not had any look purchasing one all local retailers say they dont stock them even the one where I purcased the laptop from, I did get one from Amazon which said it was the correct one but when I recieved it it was a slightly different end to the cable so can someone advise please. The model is HP G62 Notebook & the battery is a CR2032HF-243V. Thanks Normski.

A:CMOS Battery

Norm. To better help you we would need the exact model number or product number of your laptop/desktop??? http://support.hp.com/us-en/document/c00033108 REO

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hi guys,

was just wondering if you still need a cmos battery
cant the system just get updated date and time from internet after it starts?
 

A:Do you still need a cmos battery?

What if the machine doesn't have Internet access? What then? To be sure, a lot of BIOS settings are now stored in non-volatile memory; however, in that instance, consider the BIOS battery moreso like a watch battery. It helps keep time, even when the PC is switched off.
 

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Want to change my CMOS battery....what will I lose while it's out ? What will I have to reset other than the time and date ?KENNY
 

A:CMOS battery

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RELEVANCY SCORE 52

I recently had a major computer crash following a lightning storm and a lengthy power failure. I feared the worst and called out a tech. It turned out that the CMOS battery was dead and when the power had failed, the CMOS settings were lost.

The tech said that under normal circumstances, as long as the computer was connect to the power supply, the settings were retained but when the power failed, the settings went.

So if I just use system shut down on the computer at night, there is obviously power still getting to the computer. However I assume if if I actually turn off the computer on/off switch then there will be no power getting through and the CMOS battery takes over.

If I do that every time I turn off the compueter I assume that the CMOS battery will not last as long.

Am I correct?
 

A:CMOS Battery

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RELEVANCY SCORE 52

Question. In the motherboard manual it says to use a flat screwdriver to pry the cmos battery to change it. Well, I was doing that and the cmos battery sparked. First question is, what tool do you guys recemend. So, the motherboard cmos holder doesn't break, and so it doesn't spark again?
Second, is a spark from a 3v cmos battery harmfull to me, if it came up the screwdriver? I don't even know if it did, but I was a little freaked out by the spark, because it didn't say anything about it possibly happening. Of course, the pc was not plugged into a wall or anything. It, was just the battery itself.

Thanks everyone
 

A:Cmos 3v battery

Probably ran into a residual charge on the power supply.
Want to make sure not to short the 2 battery contacts or
short it to any metal on the case.
You can usually discharge a lot of that by pressing the power
button with the power supply turned off or unplugged.
The battery holder should have metal clips on one side.
Press on the opposite side of the battery to push it against the clips
then lift it out.
The clips are spring loaded to hold it in.
 

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RELEVANCY SCORE 52

Laptop is over seven yers old and is giving messages suggesting CMOS battery needs replacing. Considering it's age what would the battery look like. I have no mannual. I havn't got to see the whole motherbourd yet but can see this much. Is it there?


 

A:can you see cmos battery

Make and model may help someone to help you...
 

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RELEVANCY SCORE 52

Well im about to take out my CMOS battery and need to know if it will reset everything that ive downloaded or just my bioes settings will it reset my password for the admin?

If i remove the CMOS battery will it clear everything like a reformat?

A:CMOS battery

Clearing the CMOS will only clear your BIOS settings like Boot order, CPU settings, stuff like that. It will not format anything, nor will it reset any passwords. Even if it is a bios password, most manufacturers make sure that it is a little harder then that to clear the password. If you have forgotten your password for windows it will not effect that but there are ways to do that.

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RELEVANCY SCORE 52

I have a 486 mother board. When I boot up into DOS I get a message saying, CMOS BATTERY LOW. How do I replace it.
 

A:CMOS Battery

Crack the case open and look for it. THe older ones on 386 and 486 motherboards were some times integrated into the BIOS so you might be out of luck. Others had a small black pack that looked like 4 AAA batteries connected together and a red/black set of wires running to the motherboard....you can still get those.
 

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RELEVANCY SCORE 52

I Have an old 166 Pentiun computer with a i430vx mainboard. My problem is that the CMOS battery is dying and from what I could find on the net, it is enclosed in a discontinued Houston Tech HT12888A RTC chip. Some of the info on the internet says that you can open the chip and change the battery though it may be soldered in place and other sources say to replace the motherboard. Also will an add in card containing a clock also power the CMOS. I leave the computer on all the time and it runs fine but when I shut it down and reboot I lose time and have started getting a checksum error/CMOS battery failed message. I have another computer and would like to give this to my son and would hate to scrap a good machine for a $3.00 battery. Any info on this problem would be greatly appriciated.
 

A:CMOS Battery

Well I could understand not wanting to scrap the system due to a battery. There are several options you could look in to. 1. you could purchase a new mother board( for under $100) install it and actually have expansion room for later, or 2. You could scrap the system and keep it to use its parts as test parts or replacement parts for another computer. If it was me that faced this problem I'd look at a new motherboard first maybe you could even find a good used one.
 

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RELEVANCY SCORE 52

Is there a default in set up after replacing the cmos battery or should you take a picture with the flash off just in case?
I cannot think of any other way to know the information as print screen etc cannot be used.
TY
Peter

A:cmos battery

Replacing the CMOS battery will probably reset the BIOS settings to their defaults. Unless you or someone else has changed the settings, that will be the same as what you have now.

You could use a camera (or smartphone) with the flash turned off to record the settings. Or, you could just use pencil and paper. (Dell typically provides a fairly limited selection of settings. That's not intended as criticism.)

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RELEVANCY SCORE 52

Hi,

Ive been working on this old computer and it had a bad CMOS battery. It was the kind where you put AA's into it and then it plugged into the motherboard. I replaced it, but now the hard drive settings are all screwed up. I went into the Bios Program to set everything. But none of the options matches the hard drive. I know for a fact that this computer worked before the cmos battery went dead. The options in BIOS you can only set to
Type 1, Type2, etc. There is no "USER" setting where you can just put in the numbers of heads/cylinders/sectors. What should i do?
 

A:CMOS battery

If you have no user or auto settings try setting the bios to type one. Hopefully the drive was originally using a drive overlay and will boot ok with this setting.
 

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RELEVANCY SCORE 52

Hi everyone,
I have an NEC Versa 4230, with win95,133mhz notebook. When I turn it on it tells me the system battery is dead, and to replace it. Thing is I don't know where it is at or where to get one. Do places like circuit city sell them. Any help would be greatly appreciated. Thanks , JOE
 

A:cmos battery

Well I looked it up a NEC and the bad news is they say must be replaced by certified NEC site.

Either they just want to charge the money or it's not easy to do.

Could be soldered to motherboard instead of clip type which is a major pain.

Sorry, don't have any better info for you
 

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What kind of battery do I need for B690, generic button or something special?

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Hi,
I have a ASUS motherboard.When my Pc star to bootup,I have a line in the end that tall me that the Cmos Batt is lower and the date and time is not accurate or something like that.What kind the battery is this one and what do I have to do to change?

Thanks

Joaquin.
 

A:Cmos Battery

The most commonly used battery is CR2032. If you still have the P4S800-MX motherboard (from a May post), turn off your PC and remove the left side cover. The battery is a 5 cent coin size disk near your IDE drive connectors.

You can get the battery about anywhere (I saw them at the grocery store last week).
 

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RELEVANCY SCORE 52

CMOS battery

What happens and what is the danger to your computer if the CMOS battery dies?
 

A:CMOS battery

The CMOS battery is a very low powered device, just like a little watch battery.

So don't stress, it ain't gonna kill you.

However, its needed to keep data in the CMOS. The CMOS tells the computer what processor is installed (although many computers have jumpers set to tell it this), what drives you have (diskette, hard disk, CD-ROM, and others, and importantly your hard drive's geometry), how much memory is installed, and other important data that your computer needs to know in order to run correctly....

I imagine what would happen if it completely ran out would be that the CMOS would have to be re-written to manually in your BIOS program every time the machine was powered on for anything like normal operating to occur. Certainly you would loose the time settings and would have to redirect the BIOS to redetect the hard drives everytime you powered on.

You can replace a CMOS battery quickly and easily. They are very cheap and just clip out and in to the motherboard. It resembles a small silver disc about the size of a coin.

This is assuming that your computer is not totally ancient (like a 8088, 8086, maybe 286 or something) where the CMOS battery was sometimes not removable. If this is the case then get a new computer you sad man..... Otherwise, it will cost you nothing to replace and if you are not sure of yourself a computer store will do it in about 1 minute.
 

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RELEVANCY SCORE 52

dos this battery affect the laptops ability to boot to normal operating screen?

A:CMOS battery

Hi,Complementary metal-oxide-semiconductor (CMOS) or Real-time clock (RTC) battery keeps the date and time on your PC, power basic input-output system (BIOS) settings.BIOS settings control things such as loading your operating system, managing system memory and operating the keyboard.RegardsVisruth

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RELEVANCY SCORE 52

Not sure I am in the right section of forums but hope I can get a response. My computer is an Acer AX 3300. My problem is the CMOS battery is failing. I have a new battery CR 2032, which is, I understand the most likely type of battery to be in this computer. I have removed the side panel in the hope of seeing the CMOS but cannot locate it.
Before I start to dissemble the computer any more, can anyone tell me exactly where the CMOS is located in this machine.
Will appreciate any help as I have never taken any computer apart before.
 

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RELEVANCY SCORE 52

my system clock slows down if I shutdown system. is it b'coz of my cmos battery is being low?
How do I find whether my system has a cmos battery?How will I know what type, who is the maker etc? How do I know whether it is getting low?can u suggest some softwares that check it? I am rather naive with hardware and has opened the motherboard only to clean it.My PC is 4 yrs old. Is there any problem if I don't change it other than system clock becoming low.If it is necessary to change cmos battery how much does it cost in rupees?
 

A:is cmos battery getting low

When you open your case you will see the CMOS battery on the motherboard. It resembles a watch battery. It is flat and round and looks almost a like a button. Just pop the battery out and off to Radio Shack or any other place that sells batteries for watches and other electronic devices. The first sign of a faulty CMOS battery is the system clock changing and not displaying or retaining the correct time.

Rollin
 

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RELEVANCY SCORE 52

I need to replace the CMOS battery.  What battery number, e.g. 2302, or part number am I looking for? Thank you.

A:CMOS battery

Hi: You would replace the CMOS battery with the CR2032 3V battery. You can get that battery almost at any store.

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RELEVANCY SCORE 52

i have an acer extensa 5620z which could only power on in few seconds then goes back off ,i did some research and i discovered that it was the cmos battery that was dead so i change hopping that every was going to be fine . when i plug the adaptor in to a power extension, first the pc came on automatically and when i shut it down to and couple it ,it could not come on again.so i discovered that each time i remove the cmos battery and put it back the machine will power on but once i shut it down and couple it will not come on even to show a light .so i dont know if there is a configuration that i need to do please help me

A:cmos battery

Hi and Welcome to TSF!

A dying CMOS battery shouldn't prevent booting. A dying power supply or battery on the other hand might.

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wheres the lenovo ideapad y530 cmos battery located? anyone pls help. TY. i plan to reset my corrupt bios.
 

A:Cmos battery?

Anyone here who knows the location of cmos batt of lenovo ideapad y530.
 

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