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Lg 47cm575 will not turn on

Red light comes on but no picture. Remote will not turn it on either. I already replaced the power board and it still did not help. I am getting 110 out of out to tv.

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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: replaced lamp but no picture after 15 seconds

What is the price of that and what did they do.

Posted on Dec 31, 2007

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SOURCE: power light comes on,clicks before picture comes on then shuts of

Yes, it is either that or the "Startup Circuit" is faulty usually it is the associated relay. Thats the clicking sound you hear. When you turn on the TV, the relay is activated along with a timing transistor, the Relay has to make contact within a certain time frame. If the contact is not made during that time frame, the TV shuts down. This is a safety feature in all TV's. If you can get a schematic it will show you where the relay is or, after you unplug the TV and wait 15 minutes, you can take a look inside at the main circuit board, sometimes they mark the area with either "START UP" or "SHUT DOWN" and there you should see a relay.
But a new one usually has to be soldered in.

Posted on Mar 26, 2009

  • 1 Answer

SOURCE: Theatre View Toshiba Rear Projection TV 50 Inch with no sound or picture and a red light keeps blinking

I have the sames t.v you have to go in the back flip the power cord switch...then reboot the t.v.

Posted on Aug 13, 2009

toolkits
  • 1099 Answers

SOURCE: LG 32" Plasma TV power-on problem

Hello,

Your power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.
hope this helps...

Posted on Jul 02, 2010

Slinteriors
  • 8617 Answers

SOURCE: Samsung 40" lcd ln40c530f1fxza won't turn on

The main board would be susoect next if the power supply has already been replaced.

Posted on Mar 02, 2013

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My LG 55LB6300 takes 30 minutes to get a picture after turning it on and light is on.


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.

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1 Answer

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If you have already been inside of the back circuit board area, make sure that you don't use any type of magnetic screw drivers or any thing that can statically discharge a capacitor etc. Next since you say there are 3 boards present,the board, you are looking for is the power board.How to identify the correct one, follow the AC cord from the plug into the board that it first attaches to.That is the power board.Carefully disconnect any 6 pin or any multi pin connector and mark them for re assembly.There should be 6-8 screws that are removed then remove board.Have a very bright light on hand and carefully examine the board for any broken circuits or burnt components.If found ,go online and search eBay Amazon etc. For replacement board. Assembly is reversed order of removal.

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Since your TV was struck by lighting, the power supply is the first board that gets affected by the sudden change in AC power.. The main board is the next board due to the fragile components and the excess of voltage that is supplied to it when the lighting happened. Since you have replaced the power supply already.. I would suggest to replace the main board and that should restore the functionality on your TV.

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Hi,
The lamp has already a resistance which is sense by the processor and made the unit a subsequent shutdown. It will produce an overload to the ballast board which is detected by the processor. Replace it with new one and your unit will back to normal again.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

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1 Answer

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Power supply board is dead.Replaced the power supply board will solved this problems.Tries websites Shopjimmy.com,Ebay.com for a refurbish power supply board for the replacement.

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