@Marcfrick2112
the big hint i got that something was not right was the brown burn marks on the PSU's power connector plugs. after unplugging them and looking inside the plugs, (not the socket on the mainboard, that was ok *phew*), some of the connectors had almost burnt down to thin whispery wire.
my A4000T when i sold it, had a CSPPV060 with CVPPC, 64+16MB ram, digital broadcaster32, AD516, CV64/3D, Vlab Y/C, and an opalvision / hydra ethernet all drawing off the mainboard power supply.
AFAIK, it's still currently serving time dishing up interactive displays at the imperial war museum.
sorry to hijack the thread. :-)