OK, there's some obvious blackening on J1, which connects to the CRT. Looks like someone's been here before: there are scrape marks on the board. But before I try resoldering it, what's a good way to remove the residue from the adhesive tape? I don't want to get that stuff mixed in with the solder.



It looks like the flyback transformer was also replaced in the past, and the resoldered connections don't look so great. Should I do anything with these, or just leave it?



The rest of the board looks OK visually. I don't see anything obviously blackened or deformed. I've never tried doing rework on a broken Mac before. This is fun!