No Picture, but I have sound!

audio circuit problem, you have ruled most of the simple things out.

its the power pack in the tv that has gone out...contact the manufacturer for either the part to replace it your self or for a technician to repair it.

srobinsota,

Available at http://www.encompass.com. I have a tip at http://www.fixya.com/support/r6210638-replace_broken_projection_tv_screen which should help with the removal and replacement procedure.

Thanks for using FixYa and for the great rating. Please consider a testimonial.

hardrocko

The flashing power light on those Toshibas is usually caused by capacitors on the power board having failed solder connections. I have fixed them before by removing the power board and resoldering the capacitors. If you have experience with soldering and electronics it is an easy repair. Most shops will recommend replacing the entire board since their labor to repair it would probably cost more. Toshiba put out a service bulletin on this issue which a good technician should be aware of. (If memory serves the capacitors are C109 and C110.  Since your TV still turns on you probably haven't blown fuse F860 which often blows when these capacitors act up.)
If you would like further help with this please post a comment back here.

The TV is going into protection shutdown mode. Something insdide has failed and should be looked at by a qualified technician.

Most likely = bad Hyper board....need exact model # off back
of set for more info..................T.

http://www.casiasfamily.com/repairlog/tp50h15.html
see the link.
the problem are the convergence amps. Its a common problem for this model. Google the model # and you'll see several postings about the blinking light.

I had this with a rca once. Can you hear a crackeling noise coming from the flyback transformer? My problem was just the wire was loose

Toshiba 57H81 57 in. Rear Projection Television Go to above under solution for tip on fixing your problem.

IT sounds like you lost your high voltage going to the picture tubes. This could be due either to part of the main power supply going out due to a defective capicator or semiconductor, or something more serious in the High voltage distribution network. With the age of the set, I would be most inclined to replace it with a new HDTV, and Toshiba still are pretty reliable sets. If you can afford it, a Sony KDS-55A20 puts out a beautiful picture for around $2300.