Got a red power LED and channel switch on the RF modulator, so it's NTSC. I also checked out the capacitors, and they look fine (no bulging or leaking) so I'm going to assume they're ok. Looks like this system has just about had it. It's a shame too because it's in perfect cosmetic condition, looks like it's never even been used. Oh well, I'll spring for a new one on Ebay. Thanks for the help.