Horizontal single line on a TX-P50GT30

[gldiana]

I have just repaired a TXP50GT30 replacing the SC board, and tv lighted up again. But with a bad surprise: there's one horizontal line of pixels that randomly appears with an average of 66% of the total time, sometimes complete line, sometimes partially....
Could it be a SD board issue or more likely it is a panel problem?

[aaronwt6]

Re: Horizontal single line on a TX-P50GT30

Power the TV down and reseat the ribbon cable on the buffer board that corresponds to that portion of the screen. Looks like a bad connection to me.