Main BIOS checksum error

[awkward_dish]

When i try to boot my pc (after the motherboard splashscreen) i receive an error message saying the following:
warning: main bios checksum error!
Retrieving recovery source from HPA.... HPA BIOS not available
Retrieving recovery source from Backup BIOS.... Done!
Writing BIOS image.... (counter from 0-4080K) OK

after the counter reaches 4080k the pc reboots and has the same error.
The system is not overclocked and wasn't shut down incorrectly before the message appeared.
Would like to know what the issue is and what to do about it

Specs: Gigabyte GA-970A-D3 AM3+ motherboard
AMD960T Phenom2 X4 Black Edition Processor at 3.0GHz
PowerColorHD 6850 PCI-E Graphics Card
Seagate 500GB HDD
Antec 450W psu
8GB Cosair DDR3 RAM
CoolerMaster Hyper212 Evo

 

[itzdanielp]

I would suggest replacing the CMOS battery (Small round, looks like watch battery) before trying anything else.

 

[awkward_dish]

I would suggest replacing the CMOS battery (Small round, looks like watch battery) before trying anything else.

shall do thanks for the advice, i assume it needs to be a specific type, where can i find this out?

 

[itzdanielp]

If you take the battery out, the top of the battery will be printed with the type.