Today we watch a repair video (see below) on an LG TV model LG55LW5600 exhibiting no images or pictures upon powering on. Power indicator blinks on but the screen remains blank. One possible cause could be a problem with the LED backlights but that was not the case here as the LEDs were clearly doing their job (as indicated in the video). Turns out, the problem was the main board and the fix involved working on the main board.
It is not always the main board that causes this type of LCD/LED/Smart TV problem on an LG or any other TV brands out there. In fact, a lot cases are caused by T-Con board problems that usually require replacement of the board. You could repair main boards or T-Con boards (Read our previous post discussing training on How to Repair T-Con Boards) but it can be somewhat daunting if you are not good doing delicate work on small circuits, and micro-soldering and such. Most of the time, the suggested fix is to replace the faulty T-Con or main boards. You may find some main boards a little pricier so the the suggestion is to buy a working main board from a TV with busted LCD panel (too expensive to repair this so owners usually just throw them out and buy new TVs). These are occasionally sold on eBay so it may be worth waiting for one there if you have the time.
The video actually shows you how to repair, not replace, the LG TV’s main board so if that is the direction you wish to take for your TV then please do carefully watch the video.
See below for other LG TV-related posts dealing with other issues.
- LG, Sanyo, Panasonic & Samsung LCD TV Vertical or Horizontal Lines Fix
- Vizio and LG LCD TV Repair: LED backlight repair or replacement
- Possible fixes for an LG Smart TV that won’t connect to Wifi
Hi i’m Quinton,
My LG LED TV Model: 49LH510V
Parts: Main PCB ( Part number EAX66892303 ( 1.0 ) EBU6364903 needs repair only my power light comes on as you say the main board is a bit pricy guide of how to fix please.
Hi,
I have an LG 49UH6030 where the red light blinks three times when i try to turn it on, and then stays off. I can see the backlight for a very short time before it goes off permanently. Also, I can hear the Relay clicking once when I connect the power, and also once when I remove the power cable.
I tried replacing the Power board (EAY64388811) with a new one, but the problem is still there.
What could it be? Is there anything likely causing this specific issue that I might check and fix on either the T-Con board (LG HV490QUBB26 / 47-6021086) or the Motherboard (EAX66943504 / EBT64237742)?
Thanks in advance!