I received a 4805 from a friend a while back that had this issue, after 5 or so minutes, there is a flickering white line 16 pixels wide on the right. if the screen is displaying bright colors, it remains a constant white. if it is dark, it flickers horribly. And if it is full off (black signal), there is no line. for the first 5 or so minutes that it doesn't appear when first turned on, there are no issues at all. If displaying a bright scene in letterbox, there is a definable difference in the line between the dark area and the light area.
So, my question is, is this a poor solder connection that shows its ugly face after everything has warmed up, or has the signal processor just about had enough?