68kMLA Classic Interface

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Lisa video issue

Posted by: james_w on 2016-03-04 08:13:48 So I've just replaced all the caps and power transistors in my Lisa 2/10's Datapower PSU. Seems a lot happier now, except that the next barrier I'm hitting is that the video is messed up: Seems to me that this is most likely cap or pots replacements needed on the video board. Can anyone advise on the best course of action? Should I start with cap replacement or pot replacement or something else? Thanks!

Posted by: james_w on 2016-03-04 11:43:00 Oh I have a happy ending for this. I sprayed a bit of contact cleaner into all the video pots, then on the suggestion of my brother gave each one a gentle but firm tap with the handle of a screwdriver. The video is now happy and working! Just got to use a Lisa properly for the first time!  :lisa2:

Posted by: CelGen on 2016-03-04 20:16:56 You seem to of had the same issue I had for years.  A simple twiddle of the pots back and fourth followed by a proper adjustment and I was getting a proper image again.

Posted by: Elfen on 2016-03-05 11:34:08 Corrosion on the pots internals would make them read as if they were set at a different setting, so cleaning them with some "Tuner cleaner" would fix this. Great job done!

Posted by: mactjaap on 2016-03-05 14:23:36 Could you show a picture of your Lisa how it looka now. Had the same experiance!

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