Philips 42pf9946/12 I have this plasma screen for about three years now, but recently a single vertical line of pixels have appeared down the left side of my screen about a half inch from the frame. has any one else experienced this and id they find a solution.

The plasma display screen is made of a matrix of elements connected to cables along the side and top. On your unit, some of these many, tiny connections are making contact intermittantly thus losing the elements in that area. These contacts are held in place with just pressure and if that is disturbed, you lose that line of elements. Try squeezing the cabinet of the TV on the outside at the top in the area of the loss and see if that makes a difference. May have to go inside and see if the contact assembly is disturbed or warped or something.