Question about Toshiba 46H84 46" Rear Projection HDTV-Ready Television

1 Answer

SCreen turns red then shuts off

I have a Toshiba 46h84 Rear Proj. and I went to turn it on and the TV would come on for a second just to reveal a red screen then it shuts down and the light begins to blink. Now I have read many posts already but alot of people seem to have a different opinion on things. I assume that if my bulb was bad I wouldnt have any red screen because theres no light. So what malfunction causes a red screen then shuts off.

Any takers. By the way the tv is about 3 years old

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  • 2 more comments 
  • Anonymous May 14, 2008

    My Toshiba 46hm84 red light illuminates, then the green light flashes but there is no picture.  I replaced the lamp and the same thing happens.


    Help!

  • daisycook May 15, 2008

    My Toshiba 46H84 red light comes on, then the green light flashes several times, then both the red and green light flashes.  I have replaced the bulb


    three times in three years.

  • david_chaney Jul 20, 2008

    I am having the same problem and my TV is about 3 years old. I have it in the repair center now but they cant figure it out.... Is this a known problem

  • jayzn13 Jul 26, 2008

    my 46h84 is doing the same thing but instead of a red screen mine is blue.in the past,before the complete blue screen then shut down fallowed by the flashing power light, the unit would occasionally just shut off fallowed by the flashing power light.all i would have to do is unplug the power cord for a short period then plug it back in and it was fine for a while.now it is just a blue screen then the unit shuts off and the power indication light flashes do you have any suggestions?

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  • Toshiba Master
  • 8,617 Answers

The 46H84 has 3 CRTs instead of a lamp. Red, Green and Blue. Your red CRT is shorting out shutting down the set.Here is how you test that theory. Remove the speaker grille, there will be an access panel behind the grille remove that and you will see the CRTs red is usually on the left. hit the power momentarally to locate which tube is red. then power down and unplug the power cord. Carefully remove the tubes Circuit board. ( you may have to carefully slice the glob of silicone applied at the factory to get the circuit board off) Once you have the circuit board off the Red CRT make sure it isnt touching anything and try powering up the set. If the set stays on and the other 2 CRTs light up. That tells you the RED crt is shorted and thats whats shutting your set down. Let me know if I can assist you further.

Posted on Mar 25, 2008

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Blue crt assmbly maybe?


its very possible that the blue CRT is horting the set out. Heres how you can test it. Remove the speaker grille and access panel behind the grille and you will see the crts. remove the blue crt circuit board from the end of the blue crt and make sure it isnt touching anything then try powering up the set if it doesnt shut down then you have found the problem and you will need a new crt. or you can switch the blue circuit with the green and try it iwth the blue on green and the green on the blue then if the screen turns green before shutting down you will know that its a problem in the blue drive circuit and not the crt. lety me know if you need further assistance.

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