"I have a 5 year old Toshiba HD Projection TV. It will not "power on".....the "technician"(I use that term very losely)states that typically an error message is displayed to pinpoint problems - but in this case - there is no message and the set is not receiving power. He checked fuses then called to say that the necessary "part" was no longer available by Toshiba.As such - the TV can not be repaired ??? Any ideas.
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Something is preventing the power supply from operating:
Possible causes in order of likelihood:
1) Convergence amps failed overloading the supply (See if you can disconnect them)
2) High Voltage circuit has died. (Right on schedule since your TV is 10 years old)
3) One of the CRTs has shorted
4) The power supply itself has died (Is there a lot of dust covering it?)
See if you can isolate the failure by working down the list.
Hope Ya Fix it!
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.)
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You will need to trouble shoot the start up and shutdown circuits. Often this is a minor component failing causing the set to not power up or go into protective shutdown. Do you have the service manual for this TV?