I'm attempting to repair a C64 ASSY 250407 that displays random colors on startup.

Collected C64 Repair Resources: https://janbeta.net/c64repair.html

TIME STAMPS: 0:00 Introduction 1:32 A Look at the Board 6:12 Symptoms 9:18 Checking Voltages 10:29 Wonky Power Switch? 15:46 Bad VIC-II? 16:47 Checking more Voltages 18:00 Bad MOS Logic Chips? 22:52 Probing Adress Lines 25:39 PLA Fault? 27:51 Low Volume Sound 32:47 CIA Fault? 34:33 What was broken (so far)? 35:29 Thank you & Good night

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1 comment

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[–] 1 point 2 months ago

Nice (almost) repair, thank you for sharing. Also want to confirm that a C64 indeed can make a wonderful disco light in an 80s children room :)

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