Question about Toshiba 40H80 40" Rear Projection Television

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Sound, No Picture

I have the 40h80 Toshiba projection TV.... it still has sound but no picture. What can I do?

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The only thing you can do is to unplug the tv for 30 min. Then turn it back on and see if that fixed it. If not call a repair man, you are most likely missing a power supply voltage or deflection voltage.

Posted on May 26, 2008

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it sounds as if it is solder related, bur hard to say for sure. You ay need a service manual to actually trouble shootthe power supply and opeating circuits. I will post a lnk where you can get a service manual emailed to you

http://servicemanuals.vstore.ca/

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theres a high voltage block that all three of the anode leads attach to and sometimes a small crack happens across this block and will not let some or all of the crt's get the high voltage all at once untill it heats up a bit. now if this is not your problem i would make sure that all three crt sockets are attached to there tubes all the way as maybe justy maybe there loose and will only work after ther expand a bit. Now another problem that could cause this problem to occor origially would be that someone left off a crt ground strap and the crt arched and popped and caused the problem with the High voltage block. And no I cant see a tube being bad then comming on at first UNLESS when you say the red comes on is the picture all red with small retrace lines(small white lines)in the screen with no picture except for red???? No video only a red blank screen is what i mean. If thats what its doing then yes Ive seen heater to cathode shorts on a picture tube that would cause this problem but to be sure your really gonna need to have the set looked at.. Good Luck

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you didnt say if the set was working?? if its not I would first try the power regulator IC in the power supply It will start with an STR#####.. This goes bad alot in these sets. Good luck

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