I got a PC engine that was given to me because it did not work. They gave me an AC Adapter, a controller, an AV booste, and two games. I plugged the mini-beast in, and nothing...so I opened it up and noticed the fuse was gone, and the Voltage Regulator was gone, did some quick research on what VR it needed, and grabbed one out of a broken SNES I had laying around. Free PC Engine, with 2 games, one of which I can not play as it is an RPG and I do not speak Japanese.
The person told me it was modded to play TG-16 games, so I have one on the way...a cheap game (Keith Courage) to see if it's true.

Upon re-opening the unit, I see no evidence of a mod, so it's a vanilla PC Engine.