 Re: Screen Death: Mac Plus/512
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Organization: IBM Austin, PowerPC
Lines: 29


> I have a  Mac 512k and a Mac Plus, both of which 
> have the same problem.
> Their screens blank out, sometimes after a minor physical jolt
> , sometimes 
> all by themselves .
> 
> I have replaced the wires connecting the logic boards and the 
> video board, because it seemed at first that jiggling the wires
> made the screen come back on.  This worked for a while, but the
> blanking out has returned.
> 
> Can I do anything?  Do I need a new power supply?  A new CRT?
> A new computer?

I had the same problem with my 512 a long time ago.  Resoldering
the joints on the motherboard  fixed it.  Turns out
that continuous heating and cooling caused annular 
cracks to develop in the solder, effectively cutting the video
circuitry off.  If you're not a solder-jockey you might want to
have someone else do it -- I took mine to an electrical engineer
buddy -- but it was a 20-minute job, tops.

-Kelley-
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Thomas Kelley Boylan, PowerPC, IBM Austin, 
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                  I buy and pay for my own opinions
