Ok so have a bit of an odd one with my Deskpro 2000.
Had been working find in stock trim, opened it up this morning to fit an SB32 so I can actually put some games on it. And it started locking up at the drive detect process.
My instant thought was the IDE controller on the SB is messing with the drive detection process. So I took the SB out again. Still the same thing.
So next I set the Clear CMOS jumper incase the PnP had messed with something. Now it counts ram and just stops with a constant beep. Have pulled all the ram, swapped ram around between slots, tried ram 1 at a time in all slots, no change. At one point it did seem to go into Boot Block Fail-safe mode, so I made a Romflash disk, which it seemed to boot and do something, but just ended up back with same count ram then constantly beep deal, a POST card at this point seems to just flicker between what looks like 10, 14, and possibly other numbers starting with 1. I can't find a listing for post codes that seems to make much sense at this point so now I'm a little lost (71, and 70 is correct when counting ram, but the 17, 34 it stops at with no ram doesn't make sense in the same list (17 Clear Cmos Diag flags, 34 Verify Cmos Checksum)). This is stripped back to no drives or extra cards plugged in at all.
Not sure if allowed here but I uploaded a video of this behaviour to youtube:
https://youtu.be/K6l8nixkytg

Appreciate if anyone can offer any advice what to try next. I have a feeling the bios rom is toast