Hey all, I am in high hopes of restoring a 4300 quad. I received this unit free but not working. It appears to be in great shape cosmetically. I plan on replacing capacitors one board at a time starting with the power supply. However, before I get involved in doing anything with this unit I need to restore power first. I replaced the main fuse and power supply fuse as well. Still no power, not blowing fuses either. Power at switchable outlet as well as constant. Power on the switchable outlet powers on with power button pressed. I am a novice here so still learning. I feel like my first step should be testing the transformer input power as well as output. Should the schematic show with wires are which for testing purposes? Would any of you guys suggest a different path? suggestions are appreciated. Thank you in advance!