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Samsung TV 55" Flat Screen 4 years old. Model#UN55FH6003F 65W sound works,no picture. Any ideas? Opened the back and there are two circuit boards. One looks to be audio inputs and HDMI/USB ports.

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

Posted on Dec 07, 2016

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Does anyone know where can I buy a screen for a 27" LCD Insignia TV. Model is NS-27LCD? My screen creaked. I checked out e-bay and have not found a broken TV with a good screen. Does anyone know where I can buy a screen at. 
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SOURCE: HDMI inputs don't work

No, but the HDMI interface is very sensitive to static discharge - has been a storm nearby? To prevent this from happening again i usually install to all my customers cheap splitters just before the tv, they will fry before the tv protecting it.
I'm sorry but it's time to change that board again.

Posted on Jul 26, 2010

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SOURCE: Short circuit on the "Y" sustain board

The problem is heat!!! If the tv has fans they should be checked for normal operation,although on the early samsung models there were none, and the problem is that the panel drive buffers are getting to hot due to inadequate cooling. This is most apperent when tv is mounted to close to the wall, also external fan blowing on the rear left side will dissapate the heat. It is a problem on early Samsung and Electrograph 42 " plasma models. Hope this helps.

Posted on Dec 12, 2010

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SOURCE: No picture on Westinghouse flat screen tv

westing house flat screen tv hd...has sound no picture

Posted on Jan 15, 2011

mislamy15m
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SOURCE: Circuit diagram Samsung LE23R88BDX - LCD TV

when I turn off and then Turn on after 10 minutes the TV notwork(by using remote or touch button). I try to disconnect power supply andthen reconnect and waiting a couple of minutes and turn on but no work (nosound and black desktop) .I repeat this procedure many times so some timework and sometimes not work. please help me to solve this problem

Posted on Aug 28, 2011

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

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http://electronicshelponline.blogspot.com/
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http://electronicshelponline.blogspot.com/
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