Question about Computers & Internet
Since pictures are worth 1000 words, the first 1000 words of this explanation are above.
There is a bad solder joint on one of the matrix controllers.
You'll be able to find it by opening up the LCD as seen here and pressing the contacts in the area of the problem with a pencil eraser until the stripe goes back to normal.
Apply liquid solder flux to the affected connections (not paste) and while pressing NEAR the contacts with the pencil eraser, touch up the affected contacts with a soldering iron.
In most cases, the application of additional solder may not be necessary.
If it is necessary, sparingly apply the solder to the tip of the iron and touch up the connection.
Placing the solder directly to the control contacts increases the possibility of bridging.
Inspect the solder job afterward with a microscope or magnifying glass to ensure that you didn't bridge any contacts.
Posted on Mar 25, 2011
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Posted on Jan 02, 2017
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