Question about Computers & Internet
Typically, the CMOS battery is a flat "coin-like" cylinder under a clip on the mother board. They can also be soldered in. Most often, these are either mercury or lithium batteries designed for very small current drain but a very long shelf life.
Their only purpose is to keep alive the BIOS settings when the power is off, and your PC will retain these settings without this battery as long as the power is on, even in stanby or as long as the main batteries are installed and not totally dead.
The CMOS keep alive batteries can be very pricey, special order critters, $30-$40 is not unusual.
To replace the battery:
1) Go into the BIOS, and record ALL the settings on paper.
2) Unsnap and replace the battery very quickly, hoping
that an internal capacitor will retain the settings just long
enough to do this = 1 or 2 seconds.
3) Check the BIOS settings again and fix them back to original
if need be.
4) IF the settings are lost, you may be able to use the
"Revert to factory defaults setting" feature in the BIOS.
5) if you loose the BIOS password and cannot get in:
a) Some PC's have a clear settings jumper on motherboard
b) Some PC's have a secret recovery password
Hope this helps
Posted on Apr 22, 2008
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 11, 2011 | Acer Extensa 500T Notebook
Nov 22, 2010 | Acer Extensa 500T Notebook
Nov 08, 2010 | Acer Extensa 500T Notebook
Nov 16, 2009 | Acer Extensa 500T Notebook
Apr 18, 2009 | Acer Extensa 390CX Notebook
Jun 10, 2008 | Acer Extensa 500T Notebook
Apr 23, 2008 | Acer Extensa 500T Notebook
Apr 22, 2008 | Computers & Internet
Apr 26, 2018 | Acer Computers & Internet
Apr 26, 2018 | Motorola Computers & Internet
131 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: