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new CMOS battery and notebook wont boot

F

foges

Senior member
I have a 5 year old gericom notebook that i use once in a while, anyway a couple of days ago i got an error message at boot saying that the CMOS battery was low and i should replace it. This morning it wouldnt even boot, so i got a new battery, placed it in and when i press the on button the fan and led's start for a split second, then they die off. Ive tried removing and replacing the battery again, but the same thing happens.

I can boot with no cmos battery in, but its just annoying because i get an error message from windows every time i boot saying that the date and time are not valid. I also have to re accept all these certificates from different websites like gmail and ucas because of the date.

Any ideas what could be wrong? the battery is the exact same CR2025 3V (different brand)

Thanx
 
Wow, kind of wierd. It will boot without the battery, but not with? I'm just taking a wild guess, but maybe with the battery in the CMOS is returning a bad configuration, and with it out it is defaulting to some stored profile. I don't know. Can you install the battery and get into the BIOS setup screen to review the configuration?
 
No, unfortunatelly i cant, with the battery in it really doesnt do anything, i was also wondering if it had something to do with the bios configuration, but the thing is that to boot up i have to select "boot up with the standard values" or something along those lines. Could it be a problem that the brand isnt the same?
 
Could the circuitry possibly have adapted to a smaller voltage (because of an old battery) and therefore a 3V new battery is too much? Or is that physically/electrically stupid?
 
Originally posted by: foges
Could the circuitry possibly have adapted to a smaller voltage (because of an old battery) and therefore a 3V new battery is too much? Or is that physically/electrically stupid?
Click to expand...


From the above, the latter is obviously accurate. With the symptom of power coming up for a split second and then turns itself off, indicates a short in the mobo. Thus the PSU is sensing an overcurrent and tripping itself off. Re-verify the battery slot to make sure when installed it is not backwards (+ and -) and that it does not touch any other part of the mobo besides the spring clip. If you need to, try taping those surfaces of the battery not designed to touch other than the connectng spring clip. You might want to take a good look on the old battery how it was originally oriented in the slot. Better yet try the old battery again just to see if the power problem symptom goes away. If it did, then try another new battery. Goodluck.
 
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