Lisa jittery screens

This happened to my Lisa, after consulting with some Lisa experts found the fix was really easy. Take the top cover off the Lisa to expose the Lisa Video Board. You'll see 3 small Pots on top of the video board, over time the contacts oxide to cause the jitter....now with the Lisa on and with a small screw driver, *slightly* adjust each pot to wipe away the oxidation..return the pot to the original setting. -Chandra -----Original Message----- From: cctalk-admin(a)classiccmp.org [mailto:cctalk-admin@classiccmp.org] On Behalf Of Jeffrey H. Ingber Sent: Monday, December 30, 2002 8:47 PM To: cctalk(a)classiccmp.org Subject: Lisa jittery screens I have two different Lisa machines and both have a jittery display (one 1.2AMP PSU, 1 1.8 AMP PSU). I've followed the instructions in the Sun Rem. guide to adjust the power supply output. This works immediately after the adjustment, but the problem gradually comes back over time. I adjusted both machines around the September timeframe and the jitters have back on both machines. I'd like to get both of these machines in top-shape so I can have them running at my New Years party =) Before I go through the adjustment again, is there anything else I should be checking? I've also tried adjusting the V.Hold, but this doesn't seem to make a difference. Maybe I'm not using a precise enough adjustment? Thanks, Jeff