Question about Sharp LC46SB54U 46 in. LCD TV
I had a 1" vertical green line on my NEC LCD1970NX and fixed it very easily.
1.found the ribbon cable aligned with the green line
2.found the pins on the t-con board that lost connection with the ribbon. test by pressing the ribbon onto the board with the tip of some tweezers while the monitor is turned-on.
3.reheated the spot with a soldering iron. left the tweezers over the pin and touched the iron only on the tweezers to pass the heat through them, or else the iron would burn the ribbon.
Cause: The ribbon is attached to the board with adhesive conductive film, it is not soldered to it. So, temperature emmited by the power supply circuit just below the ribbons weakened the adhesive. While the companies do the bonding by pressing and heating (see ACF bonding), it only remains for us to do the same (again).
Some photos here: http://imageshack.us/g/1/10310900/
Posted on Sep 10, 2013
That is the sign of bad TFT driving circuits in the LCD panel assembly, not much you can do but change the LCD panel, you will get more lines as time goes by.
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Posted on Sep 07, 2010
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Posted on Jan 02, 2017
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