Mac Classic II CRT flickering

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bengi's picture
Joined: Aug 2 2005
Posts: 70

This CRT if very bright and sharp, there's only a flickering on the top corners, is there any fix? What I should look for?



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eeun's picture
Joined: Dec 19 2003
Posts: 1891

I'd start looking at bad solders on the flyback transformer. I had a similar problem with a Mac 14" colour monitor, and that was the culprit.

More common to the toaster Macs is bad capacitors (look for capacitors that have deposited black/brown poops on the board, or are swollen) and the two (are there two in the Classic II?) large diodes that tend to go bad. They usually have a cooked look on the board around them.

Usual cautions, yada, yada; care working around high voltage equipment.


"Give a man a fire, he's warm for a day. Set a man on fire and he's warm for the rest of his life."
(Terry Pratchett)