I took mine out to repair it yesterday. With mine it was the front cover causing the problem so no need to remove the screws at the back of the unit. It’s a bit tricky to remove the cover, it has a lot of catches, I started with the 3 on one long edge, these need gently levering up to release them, then there is one on the opposite long face. Initially I thought the button was binding on the cover and I filed a bit of it away but that didn’t cure it. Then I noticed the silver trim between the buttons was being pushed up when I refitted the case. So I made the tiny slot in the cover a bit bigger, refitted the cover and all fixed. I hope this makes sense.
I’d already had the dealer try and fix it, they replaced it with another faulty one, so very happy to have got this done.