That's probably the A #1 reason why I chose to go with an actual PC monitor over TV... powerstrip... just turn the whole thing off...

Just open up the power strip, replace the cheap plastic switch with a 110v rated toggle switch from Radio Shack attached to a piece of lamp cord, attach the switch to the cabinet... presto!
Yeah, yeah, yeah, you're always told to never shut down a PC "hot"... but I've never really had a problem with it... and since you're running windows, if you go to
http://www.annoyances.org you can learn how to disable the Scandisk that comes up every time you "improperly" exit windows...
The only problem is the TV... see, mine needed you to manually switch from "antenna mode" to "video input mode" every time it lost power... which is quite annoying for a closed cabinet... that's why I dumped it... if you have the same problem... I can't help you.
