This is a "home theater in a box" unit which (with another Toshiba unit, the SD-KT50) was the subject of a successful class-action lawsuit. The unit becomes inoperable with known-good DVDs. Symptoms are: at power-on, the message "Hello... Protection... Goodbye" followed by shutdown.
The only way to remove an inserted CD or DVD (other than disassembly) is to turn the volume control immediately after power-up and press the eject button at the same time.
Toshiba's web site states that it is a known problem caused by a third-party component and is easily fixed by a service technician. Toshiba is willing to repair the unit but a service facility is some distance away. I have informed Toshiba that I am a certified computer repair person, a former amateur radio operator, a retired physics teacher, and am comfortable with board-level repairs. Toshiba states they cannot share which component is involved or suggest a procedure to remedy the problem and it must go to the repair facility.
I have spent a few hours on the 'net looking for an answer to the problem without success. I'd be grateful to anyone with some information about the problem, even if it still requires a trip to the repair service.
Stan