You need to begin by locating the CMOS battery, which is a thin, round, button-like object. It can sometimes be hidden by extension cards or connectors. On older PCs it may have a cylindrical shape.

One of the main culprits behind BIOS issues is the CMOS battery. The battery powers the CMOS memory, which stores BIOS settings. If the battery is drained, the CMOS will not remember the settings, and ...

QI’m getting CMOS errors on my old PC, and I think the battery on the motherboard needs to be replaced. Can I do this myself? AThe computer holds certain configuration and clock settings in the CMOS ...