I have a IIGS ROM3 that makes a chirp sound from the power supply when I switch it off. Otherwise, everything works fine. Its a Dyna Comp LR62786 power supply shown here:
I've opened it up and don't notice any buldging capacitors. I'm OK with doing the soldering work, where I struggle is ordering the correct parts. For example on the above parts list, I can't even find item #3 100uF capacitor with 7mm pitch that meets the space requirements listed. I can't find a capacitor kit for this power supply either.
Any tips on finding the source of the noise?