Some updates for anyone interested. I was in contact with support who walked me through all of the steps that I had already tried (cleaning contacts, short restart, long restart, etc). In the end offered a 25% discount. I put the Charge 3 on charge again and did the long restart about another dozen or so times while researching other smartwatch/fitness trackers, when my Charge 3 came back to life and was seemingly working. However, it was very much hit or miss with sleep tracking (prior had 100% detailed stats, after almost always basic stats). And I have been getting the screen lines issue, and now have two different parts of the clock with differing brightness or monochrome "shades".
To top it off, when I try to use the 25% discount could link I was sent, the Charge 4 is not an option, but the Charge 3 is. I absolutely loved the Charge 3, but from my experience, and from reading these forums, I do not want to replace it with a unit that clearly has major design or manufacturing flaws!
