Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesn’t display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed with any movement. Have anyone an idea if this problem is a component failure or it is the panel where I can’t do anything to save the screen?
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Screen Display Vertical Multicolor Lines
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by Chris24Have a Samsung Q90T that has a single thin vertical line on left side. (See pictures)
When I apply light pressure at the bottom of screen along line, more vertical lines appear then disappear.
Also along the bottom of screen is about an inch of horizontal lines.
Before I tear it apart, and start inspecting driver boards, tab bonds and the Tcon, first wanted to see what the community thinks. Is it a shorted led and thus a bad panel anyways?
The picture is amazing otherwise.
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by FirentiosiThanks for offering your assistance with this. I'm an electronics enthusiast with moderate level of competence (have a decent lab with two power supplies, microscope, DSO, hot air, good iron, can competently work at a component level on SMDs, design and solder own PCBs etc). I really enjoying fixing things and learning new stuff so took up a free 58" LED TV and have been googling and watching Youtube videos to see if I can fix this! I am happy to go down to individual component replacement/strip replacement etc - it's all in the name of learning.
The issues are as follows: the...2 Photos -
by jmartinsHi all,
I have an LG 55UC970V-ZA (around 10 years old). The picture is normal right after power-on, but after ~2 seconds vertical bands/lines appear across the screen. Then it clears again, and the issue repeats in a cycle (roughly every 2 seconds).
Symptom (repeatable):
- After power-on, the picture is normal for about ~2 seconds.
- Then vertical bands/lines appear across much of the screen.
- It happens on everything, including the LG boot logo and the TV’s own menus/OSD, built-in apps, and all HDMI inputs.
- Power-cycling (unplugged...2 Photos -
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