How to fix the issue: The CMOS checksum is invalid

[RomAmoR]

How to fix the issue: The CMOS checksum is invalid

[BeemerBiker]

Go into the BIOS setup and press F9 or whatever keys sets defaults.

Go to the date and time and set the the local time accurately.

You may need to replace the CMOS battery

How to replace the CMOS battery: Unplug from wall and touch the Power-On button 2-3 times to discharge the internal capacitors. Touch the metal case with your finger before touching the motherboard to discharge any static electricity you or the case may have.

This video shows how to remove the battery when a clip is holding it

https://youtu.be/cLUWoJzjGWs

[RomAmoR · Accepted solution]

Loads of thanks for your reply.

I took your advice and  replaced the battery which had a low charge, actually.

On the face of it , this seems to have fixed the problem for the BIOS of my PC.

I wish you a nice weekend!

[BeemerBiker]

 I am glad you got it working and had no problem removing the battery.

Some are difficult to remove and I have had to replace battery sockets that were damaged by the owner in an attempt to remove.