My Toshiba tv power light blinks when turned on and has no picture or sound. screen flashes once when turning off.

Take the screen off connect power and watch LEDs if any don't flash its LEDs only needed to change faulty strip if they all flash its probably t con boards.

Since you say that there is sound but no picture, the first thing I would check would be the status of the lamp. I believe that the lamp has been shattered or the filament is blown. Please verify this and let me know

the tv is telling you it has found a major fault and needs to go into a service shop

tv will not power on. red light on switch blinks. power relay clicks, but no picture or sound.

http://www.fixya.com/support/t101749-tv_turned_itself_off_turn_back

Worked for me, was ez, and I am a huge skeptic and not very "TV technical."

I have a toshiba tv and it will not turn on. There is a flashing green light that comes on, but there is no picture or sound.

the problem is, the system control or "jungle" ic as the call it was malfunction need to replace.need more help....dnlsabangan@yahoo,com.

Sounds like a problem in the deflection circuits either vertical or horizontal. You may also want to check the solder connections in the tuner as they have been known to develop cracks over time. But the prior shrinking tends to say deflection problems.If I can assist you further please let me know.

No picture - screen is empty. Sound is ok
Check IC101 (BA7630F), if video signal comes to input (pin 1) but not present at output (pin 14) then replace this IC
No picture and sound, only a high pitch sound at switch on
Remove horizontal transistor and measure the resistance across any two pins. This value should be no less than 200ohms
Picture fades away few seconds after start-up till no picture. Sometimes no picture at all. Sometimes picture OK for longer. Sound unaffected.
Faulty joints on CRT pcb. Cracked solder joints at tube socket connections on CRT circuit board. Caused variable supply to CRT heaters. Resolder all socket pins to pcb.

I had the same exact problem.
I removed the bulb and cleaned it. There is a small screen at the top of the bulb and it was covered with dust. Once it was cleaned I replaced the bulb and it solved the problem.
Thanks to those who posted the solutions