CMOS

coverbandit · Jan 2, 2007

After being on vacation for a week, I booted my computer and windows failed to load. I got the message CMOS Settings Wrong, and CMOS Memory Size Wrong. I accessed setup, made no changes, then exited. Windows then loaded and detected new hardware which I have had installed for quite some time. After that I had no sound, none of my cd drives would work (would detect the files but not access them) and A: drive not detected at all. I rebooted and then had setup restore default values. Only the A: drive would work after that. After quite a few hours of searching the net I rebooted to obtain the AMIBOS ID String to flash the BIOS and then everything loaded properly and all my drives and sound worked fine. I am not a computer wiz by no means but I think I may need to replace the CMOS battery to obtain it's settings. If so what is the best method to do this, or is something else going on with the PC.

Texcritter · Jan 2, 2007

Hi coverbandit.... welcome to Wilders

For changing battery check out this site
http://www.smartcomputing.com/edito...ar95/pcn0320/pcn0320.asp&articleid=1437&guid=

nigglesnush85 · Jan 2, 2007

Hello

http://www.computerhope.com/issues/ch000239.htm

Issue:

How to replace the CMOS battery.

Cause:

Like any battery the computer CMOS battery can fail or lose its charge.

Solution:

If your computer is losing its time or date settings, or you are receiving a message CMOS Read Error or CMOS Battery Failure, first attempt to leave the computer on for 24 hours. In some cases this can charge the battery and resolve your issue. This often resolves CMOS battery related issues when a computer has been left off for several months. If this does not resolve your issue follow the below steps.

Replacing the CMOS battery

Write down all system settings - Ensure that the information within your CMOS, if not already lost, is written down. Getting into the CMOS setup was discussed earlier.
Locate your CMOS battery - Find the battery within your computer and ensure that it will be accessible and that it can be removed. Most computers today use a coin cell CMOS battery; an illustration of commonly used CMOS batteries can also be found on CMOS page. If you are unable to locate your CMOS battery you will need to contact your computer manufacturer.
Obtain battery information - Unfortunately, most manufacturers will not list the exact type and model of your CMOS battery; therefore, once you have located the battery, write down all information about the battery (Voltage, chemistry, wiring, and packaging). If possible, remove the battery and take it to the location you plan on purchasing a new battery from. Unfortunately, not all CMOS batteries are removable; some manufactures will only allow a replacement battery to be added.
Replace battery - Once you have purchased a new battery, remove the old battery and replace it with the new battery. When doing this ensure that you are completely aware of ESD and its potential dangers. If your computer or motherboard manufacturer has a battery that is not able to be removed, leave the old battery in the computer and add the new CMOS battery. Users with these types of computers will most likely also need to set a jumper when adding the new battery.
Enter CMOS values - Once the battery is replaced, enter all values back into CMOS or set the values back to the default settings if available. If you were unable to write down these settings before replacing the CMOS battery you may need to contact your computer manufacturer for the proper values.
Click to expand...

Hope this helps

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