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If the TV shuts off by itself, there should be some short circuit inside the circuit board. You have to troubleshoot it. If you visit this link,http://electronicshelponline.blogspot.com/
you will get some more details about how to troubleshoot main digital boards. It is very difficult to get pictures from this link, and to copy them here with descriptions, as this window does not allow me to do so. If you wish to know more, check this link.
on May 13, 2013
Emerson TV will not work with Sony Earphones
Found the problem -Emerson TV has only one circuit audio outlet and that
is being used with my HD Box - I have now spliced the red and white
connections from the Hd Box connection to TV - plugged
the spliced red and white connection into the red and white plugs and
its a done deal. Everything works just fine,
on Feb 07, 2013
I own a DYNEX DXLCD37-09. I am having trouble
The issue you describe is consistent with a power supply board issue. This is the board where the AC goes to. This problem may have occurred as a result of irregular power supply, or excess power supply or power surge.
The TV is receiving current but cannot circulate or transfer the current to other necessary part of the TV because of the defective power supply board. You might be lucky it's just a blow fuse. Also a defective transformer can cause your TV not to power on.
All these can be checked on the power supply board.
But more often bad capacitors causes problem on the power supply board. I do not think the power board needs replacement, rather those defective capacitors is causing this issue. Open unit up and take a look at the power supply board.You will probably see one or more electrolytic filter capacitors that are bulged up in the top-not perfectly flat like the others.
The value of these capacitors will be different, most likely they will be somewhere around-820 to 2200uF/25 V( or /10V sometimes)
You can replace them with same values but I would recommend the voltage rating to be higher(like 35V for an original 25V) for reliability purposes.
What happens is,these bulged top capacitors will cause a low and unfiltered DC voltage=main board will malfunction(the relay will keep clicking until the caps are holding enough charge to bring the voltage up over a threshold point).
You can buy these capacitors at any Fry's or Radioshack store or you can order them online at vendors like "mcmelectronics.com"(look for electrolytic capacitors). After replacing these capacitor(capacitors) most likely the normal operation will be restored. Or you can by a refurbished complete power board to save you some stress from www.shopjimmy.com
Note: There may be also some other causes for this symptom ,like a defective T con board ,or main board,but the bulged top capacitors are the most common cause for this issue.
If you don't know about TV repairers, take the TV to the nearest repairman to fix the fault for you. Also, note that TV stores a lot of current, so wait a while before opening the TV back cover.
I hope this helps.
on Dec 29, 2012
IF you did not have the proper surge protector for your television it is very possible that it was damaged by the storm.
on Jul 11, 2012
Tv wont turn on
That problem is usually cause of faulty capacitors on the power supply board..
Just follow this instruction to fix your TV..
1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter
on Jun 19, 2012
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