We have a Samsung HDTV 55″ inch LCD TV which is showing lines (vertically) and getting extremely hot. At times it powers on at only half of the brightness for a 20 seconds or so and then goes completely black like it is turned off. I do not know what I should be looking for or how to diagnose these TV problems. Do you think that replacing the power boards would be a good place to start? Maybe I need to open up the TV and start to check to see if the capacitors are okay? Where do I even get these TV repair replacement parts? Please help.
The issue could be related to a bad capacitor or capacitors. Maybe 10 years ago there was a Chinese capacitor supplier company selling faulty and low quality caps. Your TV may have these.
THINGS TO TRY TO FIX YOUR TV FAST:
- Try to connect all connectors including HDMI, coax, etc, to be sure all inputs are producing same issue.
- Push the HDMI connector firmly into the back of the set.
- Be sure your actual cable is not bad and causing the issue.
First: Open up the TV case (unplugged of course) and look for a bulging or leaking capacitor. If you see any that are leaking or fat and bulging, replace them. If you find no bad caps, you could replace the complete circuit board but that may be more than the TV is worth. Some of these issues are common on Samsung, Sony, Vizio, and Toshiba. Here are some places to buy caps and circuit boards for replacement HDTV parts.
2 Types of lines on a broken LCD TV screen
Possible Components That Could Be Bad:
Bad T-Con Main Control Board can cause vertical lines or half of the screen is black. Horizontal lines usually indicates a defective screen not a bad t-con board.
Bad Power Supply (Bad Capacitors, Blown Fuse, Bad rectifier) This means that the TV won’t turn on or shuts off randomly.
TV repair – Vertical lines on flat panel TV
- You have to find out, are the lines vertical or horizontal?
- Are the lines a certain color or black and white?
- What section of the TV, do the lines show up in?
- The top half?
- The lower half?
- The right side?
- Or the left side
- Is your screen discolored?
- Do the lines always appear on the screen when using different inputs?
- If you switch from HDMI-1 input to HDMI-2 input, are the lines still there?
- Do the lines on the screen show up over the menu or behind the menu?
- Do the lines always appear on the screen or are they intermittent?
HOW TO FIX LED TV VERTICAL LINES ON SCREEN
Do you have experience in fixing these types of TV issues? Please leave a comment below.
Written by Keith Schneerer
Certified Appliance Tech · Founder, RemoveAndReplace.com
Keith has spent 30+ years repairing machines, starting as a military mechanic and later maintaining food processing equipment before moving into appliance repair. He founded RemoveAndReplace.com to share field-tested repair advice.
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We have a 50 inch LG flatscreen TV that all of the sudden had horizontal flickering line issues (when it flickers it just looks out of focus for a second and then flickers back to clear but is continuous) on the bottom half of the television and within a couple of days of seeing this, now there is a horizontal permanent thin black line across the middle of the TV and below it continues to flicker? The TV is only three years old. The TV has never been moved since we bought it and placed it in our entertainment center.
Chris,
The screen is most likely damaged. If you believe the TV was left on pause with an image on the screen and it “burnt” a permanent image, patches of grey, or lines… this may be what has happened.
The grey patch may be from something sprayed on the TV screen and it left a mark. This sometimes happens when people have the TV on and they spray window cleaner on the screen and the liquid seeps into the sides and creates a permanent mark on the screen.
You could try unplugging the TV.. let sit for an hour or so to let it discharge.. then open up the TV and have a look at the screen from the inside and see what you discover. It may be something that can be cleaned from the inside.
Give it a shot and let us know what you find.
-RR
I have a 8 year old 55″ LG TV 55LH55 that has a very lite grey patch and a small thin 6 ” vertical line. The patchy area is hard to explain but it has curved lines almost swirly that are pretty hard to see. The 6″ thin vertices line starts a few inches from the top run 6″ inches and then has a slight curve to the left. Definitely not a straight vertical line at all. It can only be seen when there is a solid color on the screen. Lighter colors are easier to see. I used a magnifying loop to examine the lcd vertices columns and rows and the lcd looks perfect. Under 10x magnification I can not see the grey area even though I am right over it. The red green and blue lcd segments are all working and the same brightness as far as I can tell. The image under magnification looks perfect yet the very lite grey line and patch are there. I did check the vents in the back and they were pretty dusty. Nothing was spilled on the TV. No damage to the TV at all. I do think believe this patch and line have been there for long maybe a day or two as I think I would have noticed before. Could this be screen burn or dust inside? I don’t think my kids left the screen on with a still image but it is possible. They have done it many times in the past but this never has happened before. I tried unplugging the TV and pressing power button on tv but lines still there. I tried different input, different cables and different source for video. All produce problem. I am totally stumped. Any ideas?
I have a 50″ black samsung smart TV and I moved now there is gray thick vertical lines in the middle and on the sides there is spider like black image and the top and bottom is all black.
Samsung 50″ model number PS50A457P1DXXU (think it is a plasma?) with green vertical lines down about 5 of them in different places within left hand side not as far over as the middle. Been told to do a hard software reset but don’t know how. Any reasonably simple advice? It is like this on all input modes and been like it for sometime but would really like the picture be improved now it is watched a lot.
Kirstie wood,
Can you please give us the model number of your Technika TV from Tesco?
-RR
My LCD TV has white lines going vertically through the screen when turned on.
Then if the picture is turned off but the TV is still on they gradually fade turning a pink colour…
It is a Technika TV from Tesco.