Dead PET

From: Ian West (
Date: 2004-01-19 10:51:56


(My first post here - apologies if this is the wrong place to be asking
this.)  I've just acquired a PET 3032.  Unfortunately, all it produces at
power up is a series of faint green horizontal lines across the middle third
of the screen.  (I tried taking a picture, but the lines are so faint that
they don't really show up properly.)  I've checked the power supply output,
and all the outputs from it seem to be around 15-16V AC, which sounds about
right from what I've read elsewhere.  I'm at a bit of a loss to know what to
do next though to narrow the cause down further.

Would a problem like this definitely be something to do with the video
board, or could a motherboard problem cause something like this?  I've
looked at the video board, and everything looks fine at a visual inspection,
but that doesn't really prove much.  I also downloaded the schematics for
the board, but the only ones I could find that seemed close were for a
2001-N, and I'm not sure how similar a 3000 series is - the board I have
looks a bit different, but that could just be down to me not being able to
read a schematic properly.

Is there anything I can type from the keyboard that might help me to check
whether it's just the video side of things that is bad?  I know I could try
loading from a datasette if I had one, but unfortunately I don't have one to

Any help would be appreciated - just looking at this thing brings back so
many childhood memories of misspent hours playing "Nightmare Park" when I
should have been doing Computer Studies, but it would be so much better if I
could actually get it running again...


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