Actually, shortly after that last post I realized I had bought fast-acting fuses on accident, so the 315 and 500's were fast. Oops. But I'll go out and get some of the correct ones tomorrow and give it a shot.
Update: Just used a 500 mA slow-blo fuse, and it stayed on for a minute, then the fuse blew. The meter didn't move. I guess the next step is to start checking components. Can I check the capacitors while they're still in the PCB? Or do they need to be taken out to test them?