I recently purchased a roku select 55 and when scrolling on my directv or moving decently fast in a game or scrolling on my game console the whole tv screen will go blurry for a second then go back to looking clear. This also will dim all white letters that appear on screen when blurring occurs.
Decided to return this tv. Roku support didnt know any of the settings on tv and were of no help. This tv picture looks like you bought a box tv in 1985. If you are planning on buying a tv go with a name brand of similar price. Roku brand tv was a big disappointment.