Some of the signs of a failing CMOS battery: Your computer will sometimes turn off or not start and will generally show startup errors explaining an issue with the battery. (CMOS checksum and read error) Drivers may stop working, it can trigger driver blue screens and crashes.
What problems does a dead CMOS battery cause?
A failed CMOS battery will cause the following problems: The computer will give an incorrect date and time. BIOS passwords will be reset. Some drivers may be missing or may not work properly.
Will a computer work with a dead CMOS battery?
Technically, YES. Removing the CMOS battery will allow your computer to run however, you will lose the date and time settings, the computer will boot with default BIOS settings or you will have to choose the drive that the OS is installed every time you start your computer.
