Question about Televison & Video
Either a reflection or you are getting some light (blue?)
If total dead it needs to be opened to look for a fuse or bad caps in power supply---see attached photos of what bad caps look like.
Posted on Dec 10, 2012
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Posted on Jan 02, 2017
SOURCE: how do i replace the
You are actually referring to the buffers, the circuits that actually command the pixels - in this tv they cannot be replaced, they are glued on the side of the LCD screen and cannot be moved. If for some reason one of the buffers has failed then the LCD screen is defective for good, no way to fix it.
You could replace the entire screen but, when the entire tv costs less than $350, paying at least $200 for another new one is not worth the effort. You could try to find out a tv that is sold for parts and has an good screen - on Ebay you could pay for it less than $150.
Posted on Feb 07, 2011
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.
Posted on Sep 27, 2011
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