Could be T-con or panel - I'll vouch for T-con as I've seen this problem before and it affects the whole screen. Most panels are divided into two halves (hence two connectors from T-con) so if the problem is on both sides it's common to both sides. If it's the panel though, still might be repairable, as some Sony LCDs with half the screen blurry can be fixed.
I see posts on the 'net suggesting it is a firmware problem, but I doubt that.
