Bios not load default CheckSum error

[askmasaji]

Hello,
I had to update my bios from 060215 versiyon to 080307 versiyon ... But I cannot to save any changes... date and boot device and pci/agp...
How can I return to old versiyon bios firmware? I don't have floppy I must to use usb flash disk for booting I have on flash disk both versiyon bios and afu dos files. Helpme please. PC dont permission for bios change.... my motherboard is ECS M800PRO-M478 V.1.0

 

[askmasaji]

Excuse me! I forgot to write my motherboard... ECS M800PRO-M478 V.1.0

 

[Akashdeep]

Did youmake any recent hardware change? Ensure that your CMOS battery is working fine.