Question about Gateway GTW-P42M303 42 in. Plasma Television

2 Answers

Black Line through screen

Saw your post on and was hoping you could provide me with the necessary steps or information I need to get rid of that black line through my Gateway flat screen. My email is [email protected] I don't think I can watch another baseball game w/ that line cutting the screen in two!!!! Thanks...


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  • bobcoach55 Apr 04, 2008

    I never figured out how to fully remove the flat ribbon cable connectors but I did clear the connectors of dust and clean the connections as best I could, all to no avail.
    So once I got it put back together, I tried a previous solution's suggestion and gave the TV a good whack and for a short while it actually worked. The line disappeared for a few minutes but it eventually did come back, so I whacked it again, and it went away for a few more minutes, but now it's back again and it's not going away at all. I whacked it, smacked it, gave it an elbow... the line's still there.
    I'm open to other suggestions, but at this point, I'm thinking it needs professional attention. Thanks for your help...



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This is a serious problem. It may be a design problem or a defect in the video processing. Since it is temperature related..... or digital error buildup of some kind - it is not an easy one to diagnose without some hands-on observations and measurements.

A tech - at Gateway warranty or elsewhere - will have to put on an oscilliscope and trace through the circuits and find out where the vertical bar is being introduced. These sets are grossly complicated from a circuits point of view with several IC chips that make it difficult to troubleshoot. If Gateway warranty gets to it, they may replace the main board or the display driver or whatever is producing the malfunction.

But, I believe strongly it is a manufacturers warranty problem and they should be held to it. Make sure they realize it has been going on for before the warranty expired and you have not been able to get their attention.


ONE: Check the line cord. Wiggle both ends near the molded part.
TWO:Do a hard reset by unpluging all the cords for 4hrs and then plug it back.

THREE:The whacking test is to just bang or smack the set with your hand on the back, side, top, etc., to see if there are loose connections or cold solder joints inside that are acting up. If so, the banging should knock them back to normal and the set should restore. You might have to use some creative banging and some have had to put a book or magazine under one corner to torque the chassis enough to get it to work reliably.

If the problem still persists then like i said before,you will have to get it repaired by a technician.

Please don't forget to rate the solution

Posted on Apr 04, 2008

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Typically, black line through a panel can be caused by poor connections at the panel itself. If this unit is no longer under warranty, carefully open up the back and reseat all of the cables and connectors. Any dust/dirt in any of the connections can casue this. Also, I have seen some of the flat ribbon cable connectors loosen up. Carefully open each connector. remove the cable and re-insert. Then snap the connector closed again. Let us know if this does not resolve the problem. It is possible that the internal signal processing can cause this as well, but that is more rare.

Posted on Apr 04, 2008

  • ABRsvcs Apr 05, 2008

    Since the panel is addressed as a two way grid, a small addressing error can result in a display like this. The fact that a "whack" appeared to clear it for while reinforces the thought that it is a connection issue not a logic one. Try calling a local service shop and ask how much to reseat all of the connectors. That is still the most likely problem area.




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May 07, 2008 | Televison & Video

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