Yeah, for the BH6 I just dumped a few golder polymers extracted from a ASRock Z77 Extreme4 (defunct due to some schmuck killing the socket with a screwdriver) on mine and it ran fine since then.
Mine also had a mismatched BIOS chip from the previous chap I got it from - he mistakenly installed a 512kb chip (which ran a lower voltage than the original chip to begin with) in place of the original 256kb.
Just flashed a spare W49F002UP12B I had from a 462/478 era mobo with the BIOS and it fired up with no issues. Also replaced the missing RAM clips thanks to a VP6 that was a write-off due to burnt northbridge.