System constantly re-booting

While this post is very late to answer this question, here is where I found a solution with the DVD still inside. When I used this solution, the whole system reset and worked.

http://www.tivocommunity.com/tivo-vb/archive/index.php/t-277275.html

"I had the exact same problem tonight. I put in a DVD and it locked my Toshiba RS-TX20 up. It simply wouldn't respond to anything but unplugging. Then it went into this infinite loop of trying to power up.

I finally got it to boot:

Hold the eject button on the unit continuously while it boots up (be patient!). It didn't open the tray until a couple minutes into the powering up process. After I took out the disc, it booted up normally at the next try.

I am guessing that there's a very small window during the booting process that the dvd drive isn't locked and you have to push the eject button in that small window to get the tray open. Since we don't know when the drive is unlocked, the best bet is to hold down the eject button continuously.

I hope this helps!"