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  1. I've bought a Macintosh Classic computer recently, it was in a very nice condition with original keyboard and mouse, but with an issue of a chessboard-like pattern displayed on the screen all the time. At first I thought that it might be caused by capacitors leak on the logic board, but after I've cleaned the logic board in a dishwasher and than with pure alcohol, nothing happened — the pattern on display was the same. So I decided that caps are dead and need to be replaced. I've replaced all the capacitors on the logic board, but again with no result. After that I've found the information about this issue might been caused by broken capacitors on the analog board, so I've replaced a group of caps mentioned here (http://www.maccaps.com/MacCaps/Capacitor_Reference/Entries/1990/10/15_Macintosh_Classic_Analog_Board.html) total 8 caps, although they aren't all the same as in the guide, cause I have a later model (1992) I suppose. Still no result, the pattern on the screen is absolutely the same. What else could I try? Any help or ideas are much appreciated!
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