I have searched the forums and noticed a few posts regarding Sharp Panel RCA issues is this common for these panels? The reason I ask is my QA-1150 seems to go well on all other inputs bar the RCA out.I get a black and white picture and its rolling like the vertical hold or something needs adjusting? There is no external adjustment nor is there a menu on these panels.There are alot of variable pots on the inside but I dont want to go tweaking incase I ruin it.There are no dry solder joints either.Has any one had experience with these panels internal adjustment etc???