dead computer
Alex,
I've seen the 8520's do this sort of thing. One of the 3000's I worked on
had an 8520 that literally fried- it got hot enough to burn the fingers.
Another system had a flakey clock delay line- after about 4 minutes it
heated up and one of the delay taps faded away… that also caused a grey
screen if you tried to reboot after it failed. There are a lot of things
that can cause the grey screen.
For a first attempt, I suggest opening the machine up & pressing down on
the socketed chips and the Zorro daughterboard.
Jim
MOS via Autopilot & Amiga