After a lengthy 1982-style sampling session last week, my beloved PPG Waveterm began malfunctioning, as shown in the below photo. Now, we’ve had reason to suspect that the power supply caps were needing replaced, but hesitated because, frankly, we (my 23-year-old electronics-savvy son and I) were in no hurry to start messing about with a unit housing a 37-year-old CRT and all the voltage that goes along with it. However, it looks like there is now no choice. It powers up normally sometimes and even boots from the (8" floppy!) disk, but very quickly crashes. Wolgang Palm also suggests that the power caps may be at fault here, so we’ll start there, after testing the voltages. While we’re inside, we’ll rewire the power supply, check connections between the two motherboards (yeah, there are two. PPG upgraded the Waveterm A by stacking a new Waveterm B board on top of it) as well as other connection, where we dare.
I’d love to find out that someone here has some experience with the Waveterm(s), but I am not expecting it - these things aren’t exactly commonplace. In any event, it’ll be a neat adventure, and I’ll post photos of our progress or tales of our failure as we go!