Sorry to resurrect this thread, but I think it is time to try and repair this monitor. For the last few years, I've been more into arcade cabinets than Amiga. I've repaired quite a few arcade monitors during this time. This monitor is different, though, since it has its own SMPS versus relying upon an isolation transformer built into a cabinet.
Several times in this thread,
@mechy mentioned the FET being an issue in the ones he's repaired.
@mechy , are you referring to Q403 (a 2SC4123 located on the heatsink/shield immediately next to the flyback transformer)? Is this transistor the HOT? I've pulled this transistor and tested it via a diode test on my multimeter, and it is shorted. What I've learned from arcade monitors is that if the HOT is shorted, there's a problem somewhere else that is causing it. Where to look next? I plan on first recapping things, but, if it's the flyback that's out, is that an unobtainable part?
Thanks!