If you search on
Aminet, I think that there are a few hardware hacks for getting AT, or even ATX supplies, working with Amigas.
As for the TV, you can connect that straight into the composite out on the A2000 (you may need a SCART-Phono lead). If it has a built-in modulator you could use that, but quality wouldn't be as good. Or you could get a converter and use the big video connector - a few modes for WB and applications should work with a normal monitor then, though you would need to buy a scandoubler to get games etc on a PC monitor.
