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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Clint,
Is your Panasonic TV LED, LCD, PLASMA, or the old style that uses a powerful lamp? Can you supply us with the model number?
If you have a thin vertical line on your screen, it could be a number of things… Supply us with model number and we can go from there.
-RR
I have an 8 year old 42″ Panasonic flat screen television. For some time now a thin vertical line has run from top to bottom right in the middle of the screen. Could this be a sign that the picture tube is going?
Emmanuel,
When vertical lines appear on the TV screen, identify the cause by testing the TV picture, checking cable connections, and making sure external devices are working properly. Here is the LG TV guide how to do a picture test on your LG TV to find out what may be causing it.
-RR
I have several vertical lines on my LG 42 inches LED TV. The lines are black and it keeps increasing. Kindly let me know what might be the problem of my TV because I can’t afford buying a new TV.
my sony KLV-40R352C LED TV has black lining on screen.. Just bought 7months and its in warranty.. Now in service for checking.. I just need to repair or just need to replace them..
Steve Cluck,
Weight may have been pushed down on the back of the TV when you put it on the table with screen facing down. Is there any visible damage to the front of the TV or the back of the TV? You may have a board issue if the screen is showing wide black gaps. Open the TV and see what you can find. There may be obvious signs of damage. If not, look for loose or damaged ribbon connectors.
-RR
I have a TCL 48″ Roku Flat screen TV that I laid flat on the table, screen side down. I was out of town and when I returned I set the TV upright and turned it on. The TV has a wide black gap line about 2/3 of the way across it. It also has a white line extending left from bottom of black gap/line to the edge of the screen. What have i done? What can be done?