This is geared towards the SE/30 but your problem reminded me exactly of this troubleshooting website.
http://www.biwa.ne.jp/%7Eshamada/fullmac/repairEng.html#CheckerFlag
Chris
On Jan 15, 2005, at 06:28, Andy G wrote:
Hi Listers,
Having just inherited a Mac Classic I decided to do a cleanup and upgrade
(there was no HD with it).
However, whilst adjusting the geometry (case open) it crashed with a fatal
error and froze. I reset and now the screen now only shows a big black and
white checkerboard pattern.
This looks bad, I think it's dead, recycling the power has no effect.
Any ideas??
Andy
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