I'm taking a look at another Commodore 64 and encounter some mods and a surprisingly simple fix.
My collection of C64 repair resources:
https://janbeta.net/c64-resources/
TIME STAMPS:
0:00 Intro
0:17 Visual Inspection
3:23 Set up and Power on
5:27 Checking Voltages
6:49 Diagnostic Carts
7:16 HOT SID
8:49 Full Diagnostics
10:23 Temporary Keyboard
11:05 Kernal Switch Trouble?
12:57 Trying to reproduce the Faults
14:00 CIA is alright
14:34 Kernal Switcher is the Issue?
15:54 Testing with original Keyboard
17:43 Reattaching Switches
20:45 Final Test Run
22:06 Thank you & Good night
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