Constant reboot - pre BIOS (Gigabyte DQ6/E6400)

[GAM]

Oh no, I don't know what has happened. Everything has been working fine until I decided to lap my hsf and cpu.

I updated to F4a today and tried 430fsb, booted to windows fine but failed dual-prime. Reset back to 425fsb which has been prime stable for days. Powered down and disassembled.

After putting everyting back together, I can't boot. No BIOS, nothing. Powers up and then 5 sec. later reboots.

I have read of this issue but I haven't seen any reasons or resolutions.

What can I do? How can I get back to BIOS.

I've tried changing ram with A-data 533, cleared cmos via jumper several times, removed cmos battery a couple of times, tried disconnecting everything... nothing works.

I'm desperate. Any help is really welcome. Unfortunately this is my work machine and I have to get it up and running again by tomorrow.