How to Fix Boot Issues After CMOS Failure on HP Systems

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If your desktop computer is acting strangely or doesn’t seem to keep time properly, it might be due to a dead CMOS battery. The CMOS battery is a small battery on your motherboard that helps keep your computer’s settings, like the date and BIOS configurations, saved when it’s turned off. When this battery fails, you might notice your computer forgets its settings or the date resets each time you power down.

Here’s a simple way to fix this problem:

First, turn off your computer and unplug all cables. Next, open the case carefully. Depending on your desktop, this might involve removing screws or sliding off a side panel. Once open, locate the small round battery on the motherboard. It usually looks like a silver coin about the size of a quarter.

Gently remove the old battery by releasing the clip holding it in place. Be careful not to damage any surrounding components. Take out the old battery and replace it with a new one of the same type, usually a CR2032 lithium coin cell. Make sure it snaps into place securely.

After replacing the battery, close your computer case, reconnect all cables, and turn your computer back on. When it starts up, you may need to go into the BIOS/UEFI settings to reconfigure the date and time, but your saved preferences should now stay intact.

Replacing the CMOS battery is an inexpensive fix that can save you from dealing with confusing errors or lost settings. If your computer continues to have issues after this, it’s a good idea to double-check the battery’s placement or consult a professional. But for most problems caused by a failed CMOS battery, this simple swap will have your desktop running smoothly again.