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I have an LG425000-ZA LCD tv and when turned on in the morning the left hand side of the screen is quite dark after around 5mins the picture is fine but then sometimes after the tv has been on for hours the left hand side will once again dip into darkness. If I turn it off and on this will sometimes resolve the issue. The TV has just run out of warranty (typical) and i'm sure if we replace the inverter board things will be ok, but i just have a niggling doubt that there maybe some other power issue at play here - could you please deliver the fruits of your wisdom - thank-you.

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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 Apr 23, 2017

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6ya6ya
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Posted on Jan 02, 2017

falter
  • 245 Answers

SOURCE: Hitachi 32'' lcd tv picture runs slow sometime and goes dark

go in touch wit HITACHI costumer help and service and tell them ur problem u have.....how old is ur TV?
hope u get a answer from hitachi....and good luck

Posted on Mar 12, 2009

  • 52 Answers

SOURCE: The left side of the screen got very dark after

Sounds like the inverter for the panel for the left side is defective.

Posted on Nov 14, 2009

falter
  • 245 Answers

SOURCE: daily for about 5mins 12inch fon the left hand

go in touch with samsung service center and tell them ur problem after all the set is only 12 months old and they may fix ur problem without a charge

Posted on Nov 28, 2009

  • 8457 Answers

SOURCE: I have a Pansonic TH-50PX60u.

This problems are the 2 Buffer boards X or Z is dead.Sorry must hire a tv to troubleshoot and change the wright one.Could be etheir one or both.

Posted on Jan 15, 2011

joeguest2
  • 2080 Answers

SOURCE: I have a SANYO DP46848,

This is likely a problem with your TCON circuit board inside the back of the tv.

The TCon board usually has 2 (or 4) very thin ribbon like cables running from connectors on the board to the actual LCD screen panel. Each ribbon controls one half (or one quarter) of the screen. If you are lucky, it's possible one of the ribbons came loose or is not making proper electrical contact with the connector on the TCON board.

If your tv is out of warranty and you are comfortable working safely with electronics then you may be able to repair this yourself with a few hours of screwdriver work. The ribbons may just need to be reseated in the little flip up connectors, or you may have to clean the copper at the tips of the ribbons gently with a pencil eraser to remove any oxidation.

If you are unlucky enough to have a bad TCON board or are not comfortable disassembling your tv yourself then you can bring it in to the shop and they can probably repair it for less than $150.

Good luck and please post back with how you make out.

Posted on Jan 25, 2011

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