My computer gave up the ghost last week. I had Virtualbox running with a few instances going, was trying to copy data from old PATA HDDs to the SATA drives and was installing a Win98 VM. I had made quite a few changes to the BIOS to accomodate the PATA drives.

I noticed the northbridge and PSU were running hot but wasn;t quick enough to shut down. The PC halted.
I replaced the PSU which the fault had blown.

With the new PSU:
The +5V LED is still illuminated. When I switch the PC on (only holding the power switch on fraction of a second, I don't want to blow another PSU) the red Vcc LED flashes, the fans impulse but the BIOS doesn't load..

Would this indicate no BIOS or a more serious fault with the mobo ie NB/SB?

If I have blown the BIOS, would I be able to buy a new BIOS chip from somewhere?
Sticker details:
"Phoenix BIOS
D686 BIOS
Phoenix 1998
123564222"

What are the chances of finding a similar socket 478 mobo with SATA AGP ...?

I'm jobhunting just now, maxed out and broke so can't afford a current mobo cpu/cooler/ram.

(posted from public computer (at jobhunting place) with limited Internet rights ie I can't use e-bay etc.