Is it a CH DVD 400 by any chance? Mine did exactly the same.
Apparently there was a problem with the power boards in a massive batch of them from May 2003. I am surprised yours lasted as long as it did.
I took mine back to the store after nearly a year and they gave me my money back no probs.
Or you can try to get the power board repaired;
Goto
http://cms-system.cyberhome-dvd-help.com/modules.php?name=Forums&file=viewtopic&t=2080
for more details
cj
November 2005