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42 lg ln5300-ub led tv no picture no back lights have sound replaced power board no change whats next?

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  • LG Master
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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://electro-medical.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 Jan 01, 2017

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

javswr
  • 44 Answers

SOURCE: No Picture & No sound. Red LED, Green LED, Red LED.

If the power supply outputs are good! Then I would say the back light inverter is bad! If the screen stays black and does not come on.

Posted on Feb 28, 2009

  • 1 Answer

SOURCE: THis afternoon as we were watching our 42" plasma tv we heard this crackling sound from the back of the tv - next think we knew we got black shadowy picture. The sound was still perfect. What's going

go to the menu and see if the set is set to high power, if so change to low power , it may make a difference ...rob

Posted on May 25, 2009

  • 2 Answers

SOURCE: LG 42 TV powers up for only a second then goes back out.

Undo the back and see if the fuses are blown. Replace them if they are.

Posted on Jul 08, 2009

  • 1 Answer

SOURCE: Clicking relay no picture no audio no power light red or blue

here is the schematics http://www.scribd.com/doc/33598674/Philips-42mf231d-Chassis-Tpe1-0u-Pa

Posted on Aug 14, 2010

  • 8457 Answers

SOURCE: Samsung PS42B430 42" Plasma tv. LED flashes and

The tv power supply board have more dead components parts,u just don't have the skills an the know how to trouble shoot find out more dead components parts that all.Try website like Ebay.com to buy a whole refurbish power supply board for the replacement.

Posted on Jun 11, 2011

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LG 55LH90-UB LED TV I have an LG 55LH90-UB LED tv that has, what seems to be, sections of dim areas.


Hi ,
try swapping the screen with another one to just see if it is behaving the same, because some times the screen circuitry or the led screen could be damaged .

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I have an LG 47LN522-UB LED TV that stopped working after three years and need help diagnosing a problem with it.


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.

Apr 26, 2017 | LG Televison & Video

1 Answer

LG 42" TV no picture. has sound but no picture. LED tv. Free one comes from Telus sign up deal.


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.

Oct 22, 2016 | LG Televison & Video

1 Answer

Why does our LG 42LE5350-UB tv has sound but no picture ?


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.

Oct 17, 2016 | LG Televison & Video

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Lg LCD tv less than 2 yrs old has sound but no picture. What could be the problem? power supply, main board, etc??


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://electro-medical.blogspot.com/
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.

May 18, 2016 | LG Televison & Video

1 Answer

Why does my TV have no picture but still have sound? Its a LG LED Tv Model number 42LS3400-UA prod code 42LS3400-UA.APHLJD Serial number 2101NBSB2837 When turned on there is sound but no picture.


the picture board has gone faulty
thee are two system boards in the set --one for sound and one for picture
if you have the number from the board you want to replace try e-bay --circuit boards for your tv and see what comes up

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How to fix LG 47LN5200 TV?


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.

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