So I have had the infamous 'halo' for a while but my unit was 100% otherwise. So rather than introduce issues, I decided the halo was a small price for a unit that had no other issues whatsoever.
Well, turned it on today and all seemed ok, when the screen flashed black to show me a live segment, I seen the top right corner of the screen and what looks to be complete delamination of a screen layer.
It very noticeable now with the screen turned off and while its not causing any touchscreen issues at the moment, it might if it gets any bigger.
In hindsight, I should have sent it in for warranty when the halo started. Its now 20 months since I bought the first 820, though it was replaced Jan 17 as the original had a power on issue from new. ciq.forums.garmin.com/.../1329822.jpg