Checksum error / Cmos Default value / BIOS Setup Options [Solved]

Ask a question Pidge5 2Posts Thursday November 1, 2012Registration date November 1, 2012 Last seen - Latest answer on Apr 18, 2016 04:10AM
When I turn my computer on I get the following up on screen-
Checksum error.
Press <F1> to load Cmos Default value.
Press <F10> to BIOS Setup Options.
When I press either F1 or F10 nothing happens.
Any ideas how I can get this resolved please.
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moins plus
Hi there,

i assume we're talking about a desktop, not a laptop?

Right - Basically, there is a little battery which is on the motherboard (CMOS battery) which assists in ensuring the computer's BIOS (time, boot settings etc) stay the same when you turn your computer off.

it looks like the battery is dead and is no longer supplying power when the computer is turned off. I would recommend you replace the CMOS battery.

This can be done yourself.

Turn the computer off but leave the power cable in to earth the computer.

remove the side panel

Locate the CMOS battery, which is a 3V circular disc battery (like you'd get for a watch).

Replace this battery with another 3V battery.

These batteries are very cheap.

Aleen- Apr 18, 2016 04:10AM
Thank you . I will give this a try.
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moins plus
Its a compaq laptop, so I will try and give this ago.
Is it easy to take the back off?
Thank you for your help.
Be back if this doesnt work.
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moins plus
If it is a laptop this may be more difficult.. not all laptops have CMOS batteries you can just take out as some are soildered on.
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