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Tv keepsTurning off by it self frequently

My Philips projection tv turns it self off after a few minutes of operation. After I turn it back on it my stay on or sometimes it will do it again. It has been doing this for about 3 months it seems the problem is more frequent The model # 55PL9772

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Hi I am Vortash sounds like a component is heating and going Open circuit then it cools and the cycle begins again .. now if it is an actual component this pattern will not change however should it just be a dry joint then the set will sometimes stay on for long periods until it cools after switch off . Then the joint parts and the cycle begins again .. Now if it is a dry joint I would suggest that although it sounds an easy fix .. touching a soldering iron in the wrong place can prove rather hazardous for the unskilled not to say lethal .. and can actually cost you far more if you cross solder the wrong components on the closely packed circuit board , most engineers give a free estimate so you can also get second opinions to this problem .. I hope this is of help Regards Vortash

Posted on May 26, 2009

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I have a 50" philips magnavox tv that changes channels on it own and turns itself on frequently. What is causing this issue?


Do you live with someone who likes practical jokes; even silly ones?

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I have a watch, as a gag, that will self program its remote to operate any TV capable of this feature. With this watch, I can change channels, power status and even reset the TV to factory default state.
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I have a philips dlp 55pl9773 has one red flashing led on the front when i do a hard reset tv boots up lamps lites led goes from flashing yellow to green for about ten seconds and then back to red flashing...


MY philips tv model number 55PL9773/17 WAS TURNING OFF THE SCREEN AND LEAVING THE AUDIO ON FOR ONE MINUTE. THEN THE YELLOW LIGHT STAYED ON. THEN THE LIGHT TURNED OFF. thEN I TURNED ON WITH THE REMOTE AND THE YELLOW LIGHT TURNED ON AND A FEW SECONDS LATER CHANGED TO THE GREEN LIGHT AND THE TV TURNED ON. AFTER A FEW MINUTES, BETWEEN 10 AND 30 IT DID THE SAME THING. NOW IT IS OFF WITH A BLINKING RED LIGHT PERMANENTLY ON. TO TURN IT OFF I HAVE TO UNPLUG IT FROM THE WALL. I REPLACE THE LAMP A FEW WEEKS AGO AND IT IS FINE.

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Turning off by itself


This TV probably needs the convergence amp IC's replaced. When they go bad the TV will not turn on.Call a good TV Tech and tell him you want the IC's upgraded to STK 392-150 instead of the original STK 392-120 and check all resistors in the circuit for proper value. They could be burned or open.

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There are two common problems with Projection TV sets. Problem #1) Convergence Symptoms:
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Problem #2 CRT Fluid has clouded over. Symtoms
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  • Halos around objects
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You can see some examples and find a fix here...

bb0cf99.pngSOLUTION http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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a professional. -These electronics go threw a self diagnostic when they start up, normally they turn off when they find a problem.

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1 Answer

Tv turns off by it self


Ours 60" (60P8342) turns off after a short period of time also. My husband researched it online. The cheap solution he was told to try is to unplug the TV (or plug into power strip and switch off) when you are done watching it. A computer board inside over heats and it's a protection mechanism for it to turn off. Otherwise, it's over $100 to fix the computer board.

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