SOURCE: removed my CMOS battery, but the BIOS settings won't disable
There are 2 ways you can reset your bios.
1. On the motherboard there is a small watch battery. Remove this battery along with the power cable from the power supply. Hold down the power button to fully discharge the system. Wait 2-3 minutes then reinstall the battery and plug in your system. Your reset is now complete
2. Some motherboards have a 3 pin jumper by the battery. Lets say that the jumper is on pins 2 and 3. Remove the jumper while the machine is OFF and place onto pins 1 and 2. Power on your machine for a minute. (Note: Your system will not POST). Shutdown your machine and put the jumper back to pins 2 and
3. Your reset is now complete
There might also be an option within the BIOS to "Load Defaults" if that is all you are looking to do
please see this http://www.11a.nu/software/bios-pc-bios-security-and-maintanance-toolkit/
hope it helps!
SOURCE: IBM Thinkpad T20 CMOS Battery Replacement?
hi-- no need to take out keyboard turn over laptop and take out main battery, underneath is the cmoss battery in a yellow sleeve, it is in a black square surround with one small screw holding it in place, take out this screw and with a tiny screw driver manouvre the plastic square holding the cmoss battery out of the recess and than holding this square gentlly but firmly pull the cmoss out.beleive me it will come out, to replace just do everthing in reverse with a new cmoss battery in place.eyeball the aperture for the white connector of the cmoss and you will replace the battery.
SOURCE: IBM Thinkpad will not hold date & time.
Replace the backup battery and run BIOS Setup Utility to reset the time and date. This will resolve the issue.
SOURCE: I'm receiving 071. CMOS Battery bad and 070. Real
Probably you can get these kind of batteries either through online or nearest store like Walmart, Bestbuy or Radioshack...
SOURCE: How to replace the CMOS Battery in an IBM Thinkpad
hi,
the cmos battery is usually located on motherboard if you want to replace it or reseat it you can download the user manual from http://www-307.ibm.com/pc/support/site.wss/product.do?brandind=10&familyind=50280&machineind=183389&operatingsystemind=49979&template=/productselection/landingpages/onlinePublicationsLandingPage.vm&validate=true
on the page you have to select the model no and then you can see the screenshots of how to replace the parts.
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