Hi again. I know this was a long time ago but I just dug out the same fc twin and I'm gonna have another go at trying to fix it. Mainly for the super game boy since gameboy is 60hz so running it on the pal snes has judder. What should I be looking for?
I have a multimeter and it's not great but I don't mind buying a better one if I need to.
I uploaded a picture of the board I have. The 3 pins where the regulator used to be just has the 2 positives connected with the red cable under the board. There used to be a 7805 there and a big L shaped piece of metal presumably as a heatsink.
Also the unregulated voltage doesn't seem to go anywhere else.