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LG 42LM620T-ZE

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EVILMRB:
Hi this TV works for about two hours then I get a thin black line at the top of the screen (as seen in pic 1) and then straight away it drops down about a inch (as seen in pic 2) but at the same time the whole picture jumps at about every 8 to 9 seconds.
Any help would be very helpful, and I have uploaded the service manual for this model on this site if anyone needs it.

jordan:
Clean flat cable on T-con board

EVILMRB:
Thank you jordan, will try that and get back to you. Some tv engineer near me tried telling me I had a duff screen, but I think if that was the case it would not last two hours.

EVILMRB:
Hi jordan I cleaned the ribbons from the tcon board and after two hours the line reappeared but the picture was not jumping like before.

EVILMRB:
Is it worth me trying a new T-con and ribbons.

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