Evga 680 i

hi any advice i would be great full my motherboard is a evga 680 i my pc want boot i can get in to bios for about 10 seconds then the keyboard does not work the dates mm/dd/yy are on wed jan 1 2003 all so get cmos checksum error - defaults loaded i have took the battery out swapped the jumpers to get back to bios put i cant set anything in their as i said with the keyboard will it be cpu my psu is new i have it in my old pc with no problem its a hiper 425 watts it is not the ram as i have swapped it from a running pc