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Sharp lc-20av7u television

Tv turns its self off after screen lights up for a few seconds

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A sort circuit is there within the TV circuit board. Contact any service technician.

Posted on Nov 21, 2013

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Posted on Jan 02, 2017

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SOURCE: sharp aquos lc-37d43u tv

Same problem. TV worked night before and then would turn on but no picture or sound. Power and OPC lights blinking. I couldn't change the channel or get to the menu.
I disconnected the coaxial cable and the power for a few minutes and then plugged it back in (electric) but left the cable off. I got a message that it couldn;t get a signal. At that point I was able to change the channels. I plugged the cable line back in and everything worked fine... Good luck!!!

Posted on Jan 01, 2009

  • 3 Answers

SOURCE: my sharp lc 32d42u shut off and won't turn back on

IF YOU STILL HAVE SOUND I AM PRETTY SURE WHAT THE PROBLEM IS...

Posted on Nov 20, 2009

  • 1 Answer

SOURCE: My sharp 15

My sharp 15" LC-AV4U TV turns off within 5 seconds of when it is turned on any help

Posted on Mar 05, 2010

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My sharp EDTV, LC-20AV7U will only stay on for a few seconds, (maybe 10-20) before it cuts off. If I continue to turn it on the time lessens and lessens. How can I fix it so that it stays on?


you may have bad caps at the secondary power supply or one of the diode at the secondary power supply is leaking you will need a multimeter and a few other electronics parts solder iorn and caps and diode

Jan 26, 2011 | Televison & Video

1 Answer

I recently fixed the blinking green light problem following advice here. Now, about a week later, when I turn on the tv, I get image for a few seconds and then the screen goes blank/dark. Green light...


i have the same problem. i just replace the power board because of the "green blinking" light. now, light stays green, picture comes on for a few seconds, then blank....

did you fix your problem.

Aug 31, 2010 | Sharp Aquos LC-37G4U 37 in. HD-Ready LCD...

2 Answers

The power light blinks and the tv doesn't turn on


you should perform the initialization to factory defaults.

May 24, 2010 | Sharp LC-32SB23U 32 in. LCD TV

1 Answer

I am trying to connect my MacBook Pro to my TV


You have to go to System Preferences, Display and then choose display, arrangement and then check the box mirror images. If you have done that, and it still doesn't work, then I'm not sure what else to do! I hope that helps.

Apr 03, 2010 | Sharp AQUOS LC-20S5U 20 in. EDTV-Ready LCD...

1 Answer

Sharp lcd flat panel won't power up.


You will most likely need to replace the power supply. This is a very common problem now days, especially with newer electronics.

Aug 24, 2009 | Televison & Video

1 Answer

Monitor comes on for a few seconds then goes blank.


Your looking at profesional repair. It could be DC/DC convertor, Monitor unit or PC/IF unit. (last two are expensive)

Jan 22, 2009 | Sharp LC-M3700P 37 in. HDTV-Ready LCD...

1 Answer

Sharp LC37G4U Liquid Crystal Flat Screen


If this also happens on a DVD or video recorder, you could have a power supply issue or maybe a problem with the back light circuit. The best advice would be to take the TV back where you purchased it, if it is new. If it is not a new set, take the TV set to a repair shop for an estimate. Good Luck

Jun 20, 2007 | Sharp Aquos LC-37G4U 37 in. HD-Ready LCD...

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