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This is a video on how to repair the BP94-02084A Digital board for green lines. It covers the replacement of 2 RAM ic's. An easy way to check if this is your problem is to look at the difference between SD and HD signal sources. HD requires much less RAM to up convert than SD does, thus if HD looks much better than SD (see intro of video) then there is a good chance that this is your problem. I have repaired multiple boards with no call backs!