My friend's BIOS goes to default settings on boot-ups (this happened after her computer was off for a week), unless she leaves the computer on at the mains. The message comes up:"Default BIOS settings have been loaded due to BIOS update or checksum issue". I have tried 2 new CMOS batteries, but no change. From other threads here, it seems it could be a faulty BIOS chip. Is this replaceable? If so, how? MOBO is Asustek A7N8X-LA. Many thanks.
Yes, it would work ok, as it only keeps the battery connected, in order to keep the settings when not switched on.. if in wrong position, the bios cmos will empty as soon as it is switched off,and go to default as soon as powered up.
The answer may be in the error message,If your friend has tried to download a bios update and it has failed for whatever reason you will get this message, the link may help click here
if you read the install instructions it may determine what happened. Note of caution if BIOS updates are disturbed or they are the wrong ones it may render your MOBO useless and you may have to buy a new BIOS chip..