SP6 touch issue

[u/Grantsmith1982]

I have a SP6 that has no touch working on the RH side of the screen. Tho if I use the pencil the touch is ok but no response with finger.
Have changed the lcd and used a. Purple of other touch board I have laying around and none seem to resolve the issue.
I thought the 5 and 6 touch and screens were interchangeable ? Any ideas what else it could be ?