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TV will not turn on. Pressing the power button produces an audible click from the rear of the unit, but no other indication of power.

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The click you hear is the power relay engaging. If you get no further indication of any cactivity or you jsut hear a second click, there is an internal problem and the protection circuits are shutting down the set. Was there any symptoms prior to the set being dead? If not, the most likely cause is either a shorted horizontal output transistor or convergence ICs (assuming a CRT based set). Usually DLP or LCD based projection sets have indicators on the front that will flash when there is a problem with the lamps. If you can post the make and model, I can provide a more detailed explanation and possible fixes.

Thanks,
Dan

Posted on Sep 30, 2008

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It sounds like a faulty component on the power supply. Capacitors can cause that click you are describing so if you start your check there you might find the problem pretty quickly. Also check resistors near the faulty cap as these could have been taken out. If you are not able to check this yourself entrust a competant technician. Good luck.

Posted on Sep 29, 2008

  • Paul Sep 30, 2008

    Lol Dan please give a rating for the comment I provided matter of pride dont you know :-)

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52" rear projection tv has no power and fuse is ok


The clicking noise that you are hearing is actually the power relay. Normal operation by either the remote or the power button on the front panel, you would normally hear a soft click just after the press of the power buttons to turn the unit on or off. When you initially plug the unit in to power, you will hear the same click noise. Being that you are hearing it all the time indicates a failed relay. TV's now a days, or at least ones built during the last 15 - 20 years have different Printed Circuit Boards (PCB). There are PCB's for power (which youre dealing with now), sound,video and so on. The PCB that you need to repair your clicking issue will run you about 80 U.S. dollars for the part plus the average going rate for repair from a qualified service tech. You could purchase the part from Thompson Consumer Products repair and fix it yourself, but be aware, there will be no warranty on the part itself unless an authorized tech does the work. Located on this PCB is the power on/off relay, fuse, usually 4-5 connectors for power to different PCB's (depending on model and features). Now depending on how old the TV actually is, you may want to invest in a newr set, the reason why I say that is, is because the new power unit may and can overload the other boards and cause damage to them and now you have a new problem to deal with( along with more money being tossed down a hole.

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1 Answer

Same problem as this poster


i had a similar problem and it ended up being the bulb. The indicator light never lit up but after i replaced th bulb I checked to see how many hours where on the bulb and it was over 8100. they state the bulbs are only good for 6000. when i replaced it ($140 on ebay) everything was fine.

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sounds to me to be a shorted HOT transistor or short somewhere. the click sound is the switch mode power suppy powering up sensing a short and quickly shuts down. the hot transitor is mounted to a heatsink near your flyback. check for emitter to collector short. you can try replacing it if shorted and if lucky that all that was ..but if shorts again you looking at probably a bad flyback. good luck

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1 Answer

TV Turned off, now there is a clicking noise when plugged in.


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