Repair man
Enthusiast
Nov 16, 2015, 7:10 AM
Post #2 of 2
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Re: [doublecheese] Blue Vertical Line on 75" Samsung 3D Led TV
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This will be one of two things. It can be a bad panel or if your lucky it may just be a poor connection of a cable called the LVD cable.
If you take the back off your TV you'll see a cable that leads from the main signal board (signal board is the board with all of your HDMI & RCA input jacks) to a board called a Tcon board which is mounted either at the top edge or sometimes the bottom edge of the panel.
This cable is called the LVD cable (Low Voltage Differential Cable). The copper pads on the end of this cable will sometimes become tarnished & will not make proper connection.
If you disconnect this cable where it connects to the Tcon board & clean the copper pads on the cable with a cotton swab & rubbing alcohol, wait for the alcohol to thoroughly dry then reconnect the cable this may correct the line problem. Use a magnifying glass & look carefully to see that there are no cotton fibers left behind. Some techs use a soft pencil eraser & rub over these copper pads instead of the cotton swab & alcohol method, this also works but you have to be careful to not tear the cable.
There is no need to clean the socket where the cable connects, they never seem to tarnish; it's usually the cable ends themselves that have issues.
If you do this & the line is still there then you likely have a bad panel, which means it can't be repaired, it would require a new panel & its cheaper to get a new TV than a panel.
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(This post was edited by Repair man on Nov 16, 2015, 7:19 AM)
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