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Goes blank the TV will turn on after turning the power off it will then go blank with no audio or video

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  • Master
  • 575 Answers

Might be going into hibernation mode.

Posted on May 04, 2013

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Posted on Jan 02, 2017

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SOURCE: Unexpected lamp shutdown

Remove the lower front panel by removing the 2 large round screw heads at the lower back corners, one on each side. Remove the retaining screw on the right side of the metal horizontal retaining strip in front of the bulb holder, remove bulb retaining screw in the upper left corner of the bulb holder. Pull the bulb holder out towards you and check for dust build up on the top screen on the bulb casing, if there is an abundance of dust it will restrict the airflow across the face of the bulb which causes it to heat up and turn off. Once the dust has been cleaned your bulb should now work as it should without a problem.

Posted on Mar 13, 2008

  • 362 Answers

SOURCE: Blank screen when tv has been on for 10-20 minutes

Hi jilanfa00, 
I am happy to help, we need to check the backlight inverter.

  1. Turn tv on and get to a point that you have audio.
  2. Take a flashlight and shine it on the screen.
  3. Look very closely at the screen for a very dark video image.
If you see an image you have a bad inverter, you should be able to replace it yourself. I can walk you through in chat. Let me know your findings. Lone99star 

Posted on Jan 20, 2009

  • 1 Answer

SOURCE: was watching tv all of sudden screen turned black, with audio...

i was watcing tv afeter a while i realized there is no picture but we have sound

Posted on Sep 29, 2009

  • 152 Answers

SOURCE: Power Light is On, TV is blank.

reallyme07, sounds like a "thermally intermittant solder joint" on one of the circuit boards (switch-mode-power-supply / inverter-supply) that are a key component used to light up the "cold-cathode-fluorescent-tubes" that supply "WHITE LIGHT" to illuminate the LCD panel. you didn't state what you would like to do or how to get it repaired?? Do you have warranty on set? how old is it? The same technology is used in small screen LCD computer monitors. you may want to visit YOUTUBE and search for and view the longer video clips of LCD monitor disassembly and repair videos FYI. The same kind of problems exist for them as do your lcdhdtv. In any case, a tech type person will need to fix it by an IN-HOME VISIT or CARRY-IN to the shop. I'm louie12fix on fixya or lmistyrel@aol.com Please rate this response if possible. Bye for now.

Posted on Oct 05, 2009

budmrtn
  • 11361 Answers

SOURCE: the video cuts out after 1 minute the tv is turned

The backlight inverter board may be going out, or bad capacitors in the power supply.
http://en.wikipedia.org/wiki/Capacitor_plague

Posted on Nov 08, 2009

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I have a 50" Samsung tv. The tv turns on and the screen comes on, then within 1 minute the screen goes black. I can still hear sound.


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I found the problem was related to the lamp. Your TV power up but then the lamp would overheat and automatically shut down (audio and video) resulting in a dark screen with no sound. Once the lamp cooled (30 - 60 secs) it would come back on. Then overheat, turn off - recycling "eternally". A new lamp will solve the problem

Bye

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Blank screen when tv has been on for 10-20 minutes


Hi jilanfa00, 
I am happy to help, we need to check the backlight inverter.
  1. Turn tv on and get to a point that you have audio.
  2. Take a flashlight and shine it on the screen.
  3. Look very closely at the screen for a very dark video image.
If you see an image you have a bad inverter, you should be able to replace it yourself. I can walk you through in chat. Let me know your findings. Lone99star 

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1 Answer

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The wall mount was putting pressure against the center of the back of the tv (tv set had a slightly rounded back plate, and the mount was a flat plate). As soon as I put spacers (part of the wall mount hardware set) between the wall mount braket and the tv so there was no contact except at the mounting holes, the tv worked fine.

My theory is the pressure pushed the tv back plate against some board components which caused them to overheat (no air flow); or put pressure on internal connectors. I dont know.

Hope this helps, may not apply to your situation.

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