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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Steve,
The screen may be faulty or has small cracks or indentations.
If you have the TV opened up, check for ribbon cables being loose, damaged, popped capacitors on boards, etc…
-RR
I have an LG 50″ TV, it has horizontal lines going across end to end. Starting about 7 inches or so from the top. I have pulled the ribbon cable from the left side from the board going to the screen. Then powered on. The left side goes white, and right side has vertical lines top to bottom.
Aaron,
We have seen this before and if the water HAS gone into the vents then a board could have shorted or similar.
We have also seen this happen where the screen was sprayed with pure water and putting a fan near the TV to dry it out for about 3 days fixed it.
If it was pure water that was sprayed, then let it dry out, if there was any soap or cleaner in the spray bottle it may leave marks in on around the screen.
Try letting it dry our first…. if after 3 days or so it is still the same, get back to us with what the TV is doing at that time.
-RR
My 4 year old found a spray bottle and went a little trigger happy on my Samsung model Un50j6200afxza. I didn’t notice it until later but now there is a vertical ghosting effect about 5 inches wide just to the right of the center of the screen. I also noticed a high pitched hum from the bottom left vents under the screen. The TV is wall mounted and I can’t tell where the water got into, but the are not any visual clues that there was any entry on the back. I can see residue on the front screen but he could’ve sprayed into the vents. Where should I start?
Werner,
Is there any sign of damage to the screen on your Samsung TV?
Have you tried tapping on the screen while the TV is on and see if the vertical lines change, move, or disappear?
If so there may be either a bad board, loose ribbon connectors, popped capacitors, etc.
A bad Samsung TV UD46A t-con board will cause vertical lines, so if you find no other issues, then replace the t-con board.
-RR
I have a Samsung UD46A and it has about 2 inch thick coloured vertical lines on the screen. I want to know if its the T-con board or the screen itself?
LED50D2730M – the model number of our TCL TV. Do you have a shop here in the Philippines?