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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I have a just over 2 year old (of course like 60 days past the 2 year warranty) TCL L40FHDF12TA (40″ LCD) that recently started getting odd rolling horizontal screen stripes. It starts with horizontal stripes that move and grow. Sometimes they just flash and go away. Other times they stay and grow and roll. They are colored and often the video will freeze on parts of the screen when they are present. Sometimes just the top few inches is affected, and other times the whole screen is frozen and discolored except for a small horizontal stripe. The odd part is that it has gone away completely at times and can come back in moments or hours. I’ve watched entire movies and not had any problems, and then the next night tried to watch a 30 minute sitcom, and had to turn it off because it was unwatchable.
The audio is unaffected while this is happening.
At first I thought it was HDMI related, so I tried several different cables and inputs with no changes. Watching regular TV (via the coax input) exhibits the same behavior. Even if I have the TV’s menu up, they are affected as well. This makes me think it is NOT a signal problem, but something deeper and nastier.
It is unpredictable and doesn’t seem to matter if the TV is warm or cold.
Any thoughts or advice?
Thank you!
John,
A humming board may mean it is not working properly and therefore the screen is showing lines. Is the screen cracked or damaged in any way?
-RR
I have a 60″ Sharp Aquos with horizontal lines that move from top to bottom. After the TV warms up it goes black with a green area, then picture comes back with the lines. I can see a picture but the lines are on top of it. I checked the t-con board and 1 of the connector ribbons is humming when plugged in. Could that be the problem or is it a bad screen?
Ceri,
Is your Samsung TV a Plasma? If so the plasma gas is most likely causing the screen to become distorted or color issues. What is the model number of your Samsung TV? Do you believe the YouTube video fixed your dead pixels or made it worse? What video on YouTube claims to fix dead pixels on your TV?
-RR
I was hoping you could help me find the problem and best solution. I have a Samsung TV and I’m not sure whether water has somehow got into one of the bottom corners of the screen and causing some issues. But there is a black mark in the bottom left hand corner, roughly 1.5cm in diameter, Then leading up from there are vertical lines which span to the top of the screen. Meaning I have around 4 full columns of pixels that don’t seem to be working properly. Some times the lines disappear altogether and the TV looks fine! I left a youtube video on which supposedly fixes dead/stuck pixels for around 2 hours (the video very quickly alternates between red, blue and green to “Massage stuck pixels”) and now I have a brown stain leading across the bottom of the screen, not very high but around 4-5cm in length. I was just wondering if something was leaking inside the screen and then is some sort of reaction occurring, causing the pixels in those 4 columns to behave irregular, and if so, would using the youtube video again help or hinder the screen?
Tom Batson,
The screen on your Toshiba is not cracked or damaged?
-RR
Amelia,
Unplug the TV and PS4… then plug back in and see if that resets anything. Sometimes a simple “unplug” will fix the issue.
-RR