thomas@eleazar.dartmouth.edu (Thomas Summerall) (11/15/89)
My System: Mac II, Apple HD40 internal, 5 megs
Apple 8 bit video card, Apple RGB Monitor
68851RC16A PMMU
Orchid Macsprint Cache Card
-Four megs, the PMMU, and the Macsprint, and the motherboard
are recently installed, the problems began since their instal-
lation, but not immediately after.
The Problem: At random intervals, sometimes within minutes of startup, sometimes
after a couple of hours (usually the former) the screen flashes with static.
The flashes tend to worsen over time until they are several seconds long.
They resemble snow on a tv screen. Only after ten or fifteen of these
errors does it cause a system crash. Sometimes these crashes are so hard
that the screen remains dark after resetting and I have to manually power
down. I have no clue as to where these strobes are coming from. They
don't seem to be scrambling the RAM because only the most severe actually
cause errors. I don't have an anti static pad so I haven't tried to
unplug the MacSprint. I have turned it off with software, and the problems
still occur. Same with all inits off. It also happens in any program.
HELP! Thanks in advance,
Thomas Summerall
thomas@eleazar.dartmouth.edu