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Hi, Issue TCL 55" TV half of screen dark. Model 55ua57-w As mentioned the middle of the screen is dark. Can you suggest what might be the issue?

Posted by Mark Armstrong on


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HI there do check all circuit boards in back cover for any blown fuses or other electronic components , If all good then you will have to remove LCD screen to test LED lights . switch TV on from standby mode and shine a LED torch onto screen with room completely dark if ICONS do display ,Then i wood recommend for you start off checking your power supply circuit board or driver board . A easy way of checking if LED lights are working again in a dark room with TV switched on look through back cover vent holes for any light shinning through small openings this would determine if some or all back LED lights are blown.

Posted on Jul 30, 2020


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SOURCE: I just mounted my new 55

hi good day! just a tip and it might help try to check on the cables if they are properly plugged or you can try to check on the contrast as well, just a tip hope it would work good luck!

Posted on Jun 03, 2010


Stephen Edwards

  • 286 Answers


I could be a Liquid Crystal fault. U should take it to your local Tv repair shop.
Sorry couldnt be of more help.

Posted on Apr 07, 2011

Liam Washburn

  • 1 Answer

SOURCE: TCL TV picture too dark

try turning the light sensor off

Posted on Oct 28, 2011

SD Tech

SD Tech

  • 14553 Answers

SOURCE: Left Half of the Screen is Dark and the Other Half is Bright. Why is this?

It could be the display panel but that is rare unless the connections inside for the left side are bad or damaged.

Some info:

Audio but there is no picture or brightnessThis is a common issue in many LCD or Plasma sets and it does not have a common solution. In most cases you need to first check for missing voltages on the power supply board and for damaged filter caps there. If good voltages exist then look elsewhere.LCD (not projection) sets often use a back light to provide the light source for the screen unit (display panel) so confirming that the voltage for those is first-if the back lights are being used but not on it is either no voltage, not being turned on by the set, or bad light unit/s.In these sets there are also boards that "Drive" the panel itself. Usually the set will use two boards (some combine both into one large board---names vary but are Inverters, Y-boards (Y means video) T-con boards etc. Usually in this case only one half of the screen will be black but it is possible for it to cause a total loss of brightness also.Plasma sets are similar to some degree but with no back light in most cases.Trouble shooting can be tedious and expensive-Taking one of these sets apart requires some skill as one wrong move and the Display panel can be instantly damaged which is fatal from a repair cost point of view.Other possible solutions include but are not limited to physical problems---loose plugs or connections between boards (look for any plugs held down with tape where they plug into a board). A lot of people with problems play the guessing game-buy and try a board after research which can get expensive and may not fix the set---To gamble or not?I have seen sets where every single board was replaced and set still did not have a picture-means display panel is the problem.The problem can even be the "main" board in some cases -it controls the communication with the panel and if faulty can cause issues.Aside from checking voltages, connections etc. there are a few other considerations---The problem can be the display panel itself---Part cost for that is more than the set cost when new.The panel connects to the boards that drive it with either a multi-pin conventional plug or a RIBBON CABLE.The worst case is if the problem is a ribbon cable etc. bad or damaged INSIDE the panel where it cannot be got at.That means if the case set would cost too much to repair.The connectors where the cable attaches outside of the panel can also develop dirty or loose connections.Fans in units that use them can be an issue if dirty or not moving.As you can see (or not if no brightness) the problem sounds simple but has many possible different causes.Let me know if you have questions as I am here to try to help.SD TECH

Posted on Jun 01, 2012

SOURCE: I have a 55' Vizio Tru LED model VF552XVT. The TV ran fine for a year and a half and just recently the screen started shutting off after a few hours. I am aware that there is an issue where Vizio

It sounds like an overheating issue with the T-con board. You shouldn't have to run a house fan behind the TV to keep the screen on. Make sure you have the TV in a place where there is enough space around it to allow for air flow. Also, check to make sure the ventilation slots on the back of the TV are not blocked with dust.

Posted on Sep 02, 2012

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Samsung tv clicks and turns off and off in a cycle, you can see smart tv logo for a very small time before tv turns off again. Hey, so I have an issue with a Samsung tv un55ru7100fxza. It has this clicking sound and it’s in a cycle of turning off and on, you can see the startup logo for just a second before it turns off and on again. Almost every video I’ve seen so far talks about checking for bulging/ leaking capacitors but all the capacitors look fine and the solder joints on the back aren’t cracked or darkened. Next step is to take out each individual capacitor and test them which I really don’t want to do at all but I need to find the issue. I tried plugging in different boards to see if a particular board was causing it and I noticed that when I unplug the t con board the clicking stops and the tv stays on and I can manually turn it off, then I try and keep the t con board in and just unplug the 2 connectors that goes into the panel and the clicking continues, I feel like I need to replace the t con board but when I look up the symptoms of a t con board failing the tv just has fading or color distortions which I don’t have. So I’m kinda confused on why it would only click when that board is plugged in, if it was capacitor or power board issue wouldn’t the power board be clicking even if everything was unplugged? Awhile ago it’s done this but only for about 3 min then it worked fine and even for a week or two, but now it’s always doing it. I don’t know what to do since everyone I contacted wants hundreds of dollars to fix it. Is there anything else I can try?

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