Toshiba 34HF83 Problem

Hopefully my 2 year old tv isn't dead - I switched video modes to my book pc and noticed that it was out of alignment, so I turned the tv on and off to fix that problem, which always works. When it came back on, I had a black screen and audio. I can see the OSD menu, but can't seem to get a picture back, no matter which input / mode is used. Have reset by unplugging for 15 minutes, tried analog cable directly into the set, tried the front panel inputs with no luck. Went into the service menu and can see the numbers/letters in the upper right corner. Anyone have any suggestions other than getting it in for service? tia Sheila Vancouver BC