I have a 65 inch toshiba tv it work perfect the day before the next day no picture no sound and the power light keep blinking red

call toshiba customer care. Seems like software issue. I had the same. I was told to put 2 special files on a usb drive, connect it to tv, to reflash to tv software. it came back to life after that.. just try..

It could be the lamp went out and needs replacement. The Toshiba website states when this happens to unplug the televison for 10 minutes then plug back in. If that does not work then try another power outlet. If that does not work then call for service

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

I have the sames t.v you have to go in the back flip the power cord switch...then reboot the t.v.

42 inch Toshiba DLP. Was watching a movie and the screen went dark. The red light started to flash and kept flashing. any ideas 

Not an easy fix....requires chassis pull, careful soldering and
replacement of parts and fuses.....would you like step-by-step?
........................T.

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.

Sounds like a main STR regulator problem