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Emerson 55 inch LF551EM5 comes on for 3 seconds then goes off, I have replaced the main board and power board, what else could it be Thanks

Posted by Fred D Forshee on

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Larry

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Sounds like you received a defective board, this model set has a lot of issues with both the main and power, but in your case I'd guess it's a power supply issue if it comes on for a few seconds. Where did you buy the boards from...if it was ebay it's common to get bad boards from there

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1answer

I have a 55 inch Seiki tv and when I plug it in the standby light comes on for a couple seconds than goes off and that's it. Does that mean the power unit is bad or the main board?

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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I have an 55 inch Emerson TV, it would not come on it make a buzzing noise, what could that be.

This is most likely a part that has failed in power supply. If you have the time and expertise you can take it apart and troubleshoot and repair it. You need special gear and soldering ability, if you don't have the time, you can order a new power supply and put it in, you can also call for a service technician to come out. THis is not cheap to have service come out. With a television that large though, you don't have a choice. IF YOU decide to move it to a shop, you CANNOT lay it flat!! The screen will bounce like a trampoline and it will break.
1helpful
1answer

EMERSON 55 INCH TV MODEL: LF551EM5 SERIAL: DS2A1433113216

Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
1helpful
1answer

I have a emerson 39 inch led tv. The problem is that it will power up and picture/audio works perfect,however after about an hour the screen goes black but audio stays on. Thanks!

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.
...
0helpful
1answer

Emerson 55 inch LCD TV no picture, but backlight and sound works

T'Con board fault. Check and replace it. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
1helpful
1answer

LG 55LX6500 55 inch LED TV display gone, but sound works.

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.
0helpful
1answer

I own an emerson lf501em5f 50 inch tv believe the main board to be bad

according to what you tell me . already tried a new power supply . , then the problem is is the main board.
0helpful
1answer

Tv plays about 2 minutes and picture and sound goes off, comes back on.Does this 3 times then tv shuts.turn tv back on and repeats sequence.

there is main board defective please replace the main board 3 time blink is dc alert which is happened in side the system ic & we cant replace the system ic so we replace complete main board
8helpful
1answer

Emerson LC320EM82 S LCD TV I purchased this TV a year and 3 weeks ago. It suddenly stopped powering on. When I turn it on the screen comes on for half a second with 3-4 inch white lines across middle of...

Your not alone with this problem.
I had to fix mine. The warranty is less than impressive.
The trouble is going to be the Power Supply/Backlight Inverter board.
This is the picture of yours:
11e1946.jpg This is board # BA71F0F01042. Replacement boards are hard to come by.
Fixing the board like I did seem to be the only option. If you need info on fixing it, let me know.
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