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Lg 20ls7d front green light is on but the screen is black. no sound

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: LG 20LS7D

It uses a regular power cord, the kind that you would use for a PC.

Posted on Dec 21, 2007

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  • 1 Answer

SOURCE: LG LCD TV 32LC4R BLACK SCREEN

same here How do you change the Power regulator?

Posted on Jan 28, 2008

Ajkill
  • 2035 Answers

SOURCE: LG 20LS7D TV

1. Try this - hold the menu button down for 10 seconds. TV should power up; you will have to turn off front panel buttons on menu.

2. You can also try a hard reset: Unplug TV from AC mains and remove all cables from TV. Wait about 30 minutes and replug to AC power and redo the cabling. Switch on the TV and see if it works..

3. Powering down the set or putting it in standby may have allowed the power supply to cool. Weak capacitors often go out of spec when they cool, thus preventing a section of the power supply from firing up properly again. There is a simple trick...just warm the back of the TV with a hair dryer for 5-7 mins after you have unplugged the TV. Look for the little areas of holes in the back panel of TV. Use these as your guide at where to use the hairdryer, but don't hold the dryer too close (say 5-6inches away). (Make sure the dryer is on High heat). If the TV doesn't turn on after you have heated it up (like it tries to come on but then turns off) you need to unplug the TV again, this resets it. And repeat those steps till it works. Resetting the TV after it fails to turn on is the key.

then the fly back unit is failed you need to resolder the contacts or get it serviced...............

Posted on Jun 08, 2008

  • 2 Answers

SOURCE: LG RZ 37LZ55 37 in HDTV LCD Screen Dead

This is likely due to a failed power supply. Replacing the power supply board should solve the problem.

http://www.reviewcentre.com/reviews110919.html

Cr1spy

Posted on Apr 06, 2009

  • 22 Answers

SOURCE: Black screen on a 20ls7d LCD TV

I work at CNN Have had 6 of these monitors go out in as many months. Take out the power supply and change the 2 exploded 680u capacitors. They're being overheated by the underrated MOSFETs on the reverse side of the board. I'm looking for some substitute MOSFETs that handle power better; but replacing the caps will usually fix the problem. Otherwise replace the supply.

Posted on Apr 01, 2010

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I work at CNN Have had 6 of these monitors go out in as many months. Take out the power supply and change the 2 exploded 680u capacitors. They're being overheated by the underrated MOSFETs on the reverse side of the board. I'm looking for some substitute MOSFETs that handle power better; but replacing the caps will usually fix the problem. Otherwise replace the supply.

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Hello!! Go into the menu and set "closed captions" to OFF. You have closed captions set to "TEXT".

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Oct 01, 2008 | LG Televison & Video

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I have an LG 20LS7D flat panel LCD TV. Sound is on but no picture. The problem was intermitent but now nothing but sound. Help


Possibly th emain board needs to be replaced actually you need to check some voltages first but with just a sincere guess signal cba

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NO POWER


I ended up unplugging both sides of the power cord (from the TV and the wall), waiting five seconds, plugged it back it, and it worked fine.

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