On 23/09/2019 11:19, Dave Plowman (News) wrote:
It also has a DigiGram audio card that has balanced in outs as well as the
various digital options. And a video capture card. I'm rather wary of the
costs of updating all of those.

Have you tried removing both those cards, and shorting the
'reset cmos' pins, then trying to boot it again with minimal
hardware ?.