Video signal problem

Hi folks,

I think my board finally died. I had the video signal problem (Monitor does not display anything after the board boots) but used to remedy that by removing the video card and unplugging the PSU. Leave it unplugged for an hour or two and it comes back.

When I boot up, the fans spin up..... and then nothing. It just sits there taunting me . I've taken my system apart and rebuilt it. Tried all the usual fixes/tweaks- different ram in different slots different vid card, hard drives, power connectors...etc. All components were working when tested in my friends rig- GfX, CPU, RAM & PSU.

I think it's died on me. After it boots the fans spin up, the CPU and GPU's are running as you can feel the heatpipes become warm after 5 mins or so. The hard drive light also shows activity but the monitor just won't turn on (I've also tried another monitor).

I've also noticed that the usb ports and the keyboard ps/2 port won't power up, either will the bottom 2 chassis fan headers. The only rear port that seems to be working is the mouse port.

Does anyone know if the above symptoms could be a corrupted BIOS? I'd rather replace a BIOS chip than get a new mobo (though the Rampage X48 is tempting ) or would I be wasting my time getting a new BIOS chip- I'm in Ireland so I'm not sure where to source one in UK/Europe?