What Happens When A Cmos Battery Dies. All personal computers have a small battery on the motherboard that provides power to the Complementary Metal Oxide Semiconductor CMOS chip hence the name CMOS battery. At it switches on you would need to enter a couple of basic commands for it to start its operation system.
If the CMOS battery dies settings will be lost when the computer is powered down. When a CMOS battery in your computer or laptop dies the computer or laptop will be unable to recall its hardware settings when powered up. As laptops need to save all the bios options so all the laptops must have a CMOS battery.
A dead CMOS battery is also the cause of why your computer wont.
Maintenance practice to replace the CMOS battery about every 3 years to ensure it is strong enough in voltage to retain the CMOS settings. It is likely to cause problems with the day-to-day use of your system. But whenever i shut the PC down and plug it off the wall because here in Argentina we have horrible electriciy companies and for safety i plug off the PC from the wall the CMOS battery resets the BIOS to its defaults time get stuck at the time i shut the PC down for the last time but it keeps the profiles i. The CMOS battery only powers the real-time clock on the cRIO and it does it only when the cRIO is not under power.
