Question about Toshiba 50H71 50" Rear Projection Television

1 Answer

Toshiba 50H71 Won't Come On

When powered on we hear a click but nothing happens. Red light flashes in the front panel. How can we fix this?

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  • babygirl75 Dec 22, 2008

    Hi! Your response seems to be very insightful...is there any way you
    can help me to locate these parts you are referring to? I greatly
    appreciate your help!!
    Thanks Again!
    Kim

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  • 13 Answers

This could be caused by several different things.. your convergence amplifier ICs could be bad, causing 1 of the 2 pico fuses to open up.. another possibility could be bad solder or defective hybrid voltage regulator to be bad (its usually a light brown color).. worse case could be a cracked picture tube hidden by the deflection coil on 1 of the 3 tubes.. might also wanr to check if the horizontal output transistor is shorted..there is also a 1A pico fuse that could be open..

Posted on Dec 22, 2008

  • dj70s80s Dec 22, 2008

    Sure.. If I am not mistaken, then if you are facing the back of the tv, the hybrid regulator (Light brown in color) will be to the left of the the set (on same board as the flyback transformer).. I had one which did what yours is doing, and found that the solder connections were bad on this regulator..keep in mind that there is a possibility this ic could be defective.. also very close to this ic you should find a 1A pico fuse (eithere grren or black in color) that could be open.. if its not these 2 things causing the problem, then check the 2 pico fuse for the convergence , which are also on this board... i think they are 4A.. if either of those are open then you will need to replace the STK392-150 ICs.. The horizontal outup transistor is located close to the flyback transformer..check to see if it is shorted...if it is none of these then it might be a cracked picture tube, althought if this is the case usually you will hear some arcing before the relay clicks off.. hope this helps you some

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