+1 Measure the voltages on the connector. There's a pinout diagram further down ...

		Pixelbrick on Sept 16, 2022 \| parent \| context \| favorite \| on: The lost ways of programming: Commodore 64 BASIC (... +1 Measure the voltages on the connector. There's a pinout diagram further down on this page: https://retrogamestart.com/answers/replace-c64-power-supply-... I've seen a bad power supply kill one of the two CIAs, the color ram & damage the SID on a C64C