Evening,just to clarify as to how to adjust picture on peacock tv when out of sync/focus, (On Firestick.)
1) go to Display and Sound
2)click on Display
3)change resloution to to 1080x60.
4)Return to Display and Sound
5)Scroll down to Audio and click on it
6)scroll down to Surround Sound and click on it.
7)You will see immediately below "Best picture" either Stereo or PCM
8)Click on whichever,ensuring there is a TICK, on right hand side of word.
That should do the trick, return to peacock tv, hopefully all will be fine,have done this now on 3 4k, hd,firesticks and all worked.Hope this helps someone as has been an absolute nightmare to sort,,,once again a really big thank you for your help.