Found my own answer, should have searched more throughly from the start :/
Originally Posted by cwitt
am i the first person with the 970 who has had this problem? unfortunately my service menu isnt the same as the 800's so i cant use the fix on this thread. anyone have a clue?
Yes. This problem was supposedly corrected with a design change for the HS420, XS955/XBR960 sets. A PLL circuit was added to the MID. I haven't seen any reports of the above sets exhibiting this issue and I'd be surprised if the 970 took a step backward in design.
Are you sure that the problem you are seeing is the same as discussed in this thread? Have you checked to see if you have a service menu item HDPT?
My HS510 exhibited this problem with a 3inch wide pinkish vertical bar that moved left to right across the screen once per second.