Bios causing problem?

OK – my PC is powering up the motherboard, CD & hard drives, however nothing appears on the screen…

Ive tried swapping memory around to see if that makes any difference, in doing that I thought I’d see what would happen with no memory, strangley the BIOS does not beep to alert me to that fact which would suggest its not checking the memory on the POST test…

Could this be a dead CMOS battery? – not sure as the PC was working fine before with no signs of any deterioration of the battery before that.

Either way I need to find a way to get my PC working again – right now ive run out of ideas, especially as it doesnt seem to care whether the memory is present or not!!!