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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Kelvin,
The thin vertical lines can appear after the unit has been on its face or laid down on its back. It can gradually go away, but if the panel was affected by the electronics behind it the damage may be permanent. Has your TV been laid down or moved recently? If the problem has come about by itself, it may be that the screen is damaged and causing the lines. How old is your Toshiba TV?
-RR
I have a Toshiba 40PB200E LED TV that has a few black thin vertical lines.
The lines started appearing a couple of months ago. They come and go, but they are becoming increasingly permanent.
These lines appear even when the TV is not connected to an input.
If I press the menu button, the lines appear above the menu dialog.
By the way, the TV is not damaged in any way.
I rotate it fairly often to face the direction where I am seating, but have never dropped it or anything.
Chay Jude,
What is the model number of your TV? Is it plasma, LED, or LCD? Has the screen been damaged?
-RR
The left half of my 52″ flat screen is normal and the right side is red. I can still see everything but it’s very annoying. How much will it cost to repair? Or can I do something myself?
Tammy,
Was the screen hit or did the TV fall over or was the TV like that when you opened the box?
-RR
I just bought a LG 32 inch led TV. However the screen is purple in the middle then black and white vertical lines appear.
Brian,
If the screen is damaged, then buying a new TV makes more financial sense…. If there is a bad board in the TV causing the image to be distorted, replacing a bad board can cost as little as $30 US dollars and your TV is fixed. You will have to troubleshoot the TV internally to be sure which board is causing the issue. You may have a voltage inverter issue, possible t-con board problem, or another board causing the problem.
-RR