Hello, I have a Panasonic PT-43LC14 projection HDTV. The cable (Coaxial) and RCA inputs produce pulsing vertical lines that look like small rectangular vertical blocks, however, the HDMI & VGA work fine. I have found lots of posts on the internet about convergence settings and calibration, but they all seem to be about different symptoms than what I am experiencing. Has anyone ever come across this issue? If so, were you able to fix it? Thanks.