other vintage hardware, software and languages • Mac II Si PSU repair

My son's acquired a Mac II Si with Sony PSU. True to form, all the caps on this PSU had leaked horrifically. So I removed them, cleaned the board with IPA, and replaced them. The schematics are here (PSU is last page): https://www.applefritter.com/files/Maci ... arc%29.pdf To my immense surprise, it worked first time! Then a couple of days later, it's stopped. Now, it gives the 5V trickle voltage…