Vertical colored lines on 3 of 4 panels

My initial problem was a gray faded screen, then it turned into vertical colored lines on 3 of 4 panels. I changed the flat ribbons connecting the T-con board to the panels and replaced the t-con board as that was suggested in another answer, but the only difference is that one panel is now perfect (not faded), but other 3 have these vertical lines. Any ideas? Thanks