On the discussion page for an article, somebody posted this question about power supply voltages (see here Link:
"Please tell me what happens if you power a C64 with 5 VDC only, without applying 9 VAC? I recently did just that, and the machine started normally. The RF modulator does not work, as well as sound. But when connected via AV out, it is possible to use Basic as usual.
My question is the following. Will prolonged usage of a C64 without 9 VAC cause any damage to it?"
Can anyone help with this?