Question about Emerson LC195EM9 19 in. LCD TV

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Power inverter board didnot solve the problem. when the power button is pushed the green light comes on for just a sec and then reverts back to the red standby light. Have already tried leaving the thing unplugged. Have replace the inverter board.

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This problems is the causes of the power supply board.The power supply board have problems,it is not giving the tv the wright voltages anymore.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Posted on Nov 15, 2010

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VIZIO tv it powers up for about 5 min then a load screech then powers off. We can do that over and over no change we did factory reset and the power button hold for 30 sec no change


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.

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1 Answer

When turning on from standby the screen flashes (1 sec)LG logo and then reverts back to standby


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

Screen is black but led power lights come on ,yellow/green


Sounds like back-light inverter fault. 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.

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1 Answer

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if the power indicator at the front panel stay lit but no screen display or black screen, it could be a sign of bad power inverter board or screen back light. now to ensure if it was the cause you can do a voltage checking, at this time you will need a digital tester. you need to know if their is a bl_on voltage at the power inverter board around 3-4.4v to turn on the inverter board that supply the back light.if the power inverter board has 12v dc and has bL_ON voltage then the cause will be a bad inverter board. you must check also for a dry joint connector going to back light.

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I turned my t.v. on w/the remote. it came on then turned right off. at least i thought it did. there was no picture and the power light was blinking on and off with a green light. I pushed the power button...


Hello; This problem is likely caused by bad inverter board(s). I think there are 2 on the left side on this model. If either inverter doesn't start, the microcomputer on the main board see's this and generates one "lamp error" . Once it counts 5 lamp errors, the screen will not light and led(s) will flash. These boards are about $100 each and no way to know which is bad. It can also be caused by a bad LCD panel ( cost more than the TV sold for). You can verify a lamp error problem by doing a "forced start" . The set must be unplugged. then"I think" Hold the channel up and volume down buttons on the set or VISa Versa, and plug in without releasing these buttons for several seconds. If the set makes a buzzing noise , the power supply board is bad. If the set comes on and stays or goes off this is the inverter and/ or LCD panel problem. John

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1 Answer

When I push the power button it blinks and never turns on


I recently repaired this exact TV that sounds like the exact problem. First you can take the back off and unplug everything from the Inverter board. The inverter board has the pink and white wire plugs going into it. Then try to power on the TV and if the green light comes on, and stays on, then you know the problem is in the inverter board. My problem was in the inverter and I found Q1500 (N Channel MOSFET) shorted Gate, Drain, and Source together. Just for safe measure I also replaced Q1550 that is the same exact part on that board. I was able to order the parts from http://www.utsource.net/ and the part # is 2SK2417.

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2 Answers

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1 Answer

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