I have a similar problem with my 4000, i had a 350w psu and have 3 scsi drives, 2 floppies, 4 fans, voodoo 5500 and other cards and the green light dimmed totally. To do my head in even more i got a 600w seasonic psu and it did the same thing. I could not even boot into workbench that often and usually got a blank screen so I thought the CSPPC was dying. Without the PPC card i get no problems at all.
Ive sent it all to Amiga Center in France for a total health check.
