My partners beloved Commodore 64 switched on and managed to load games via a multicart but I couldn’t get any sound output.
After a short Internet search, I found many articles suggesting the SID chip would probably be faulty. This chip is the sound synthesizer for the C64. The diagnostic cart test showed some errors and when it got to the sound test, again there was no sound output.
The case opens after removing three screws along the bottom of the case.
This is the faulty SID chip on the motherboard.
This is the new 6581 SID chip that I ordered from Etsy for just under £38.
The diagnostic cart still shows errors but the sound now works.
This is the multicart with a selection of games to play.
Looking at the list of games on the multicart:
Playing Astroblitz from the multicart: