Hi are these a new or used pair?

Looking at the image, it’s looks like there is a bloom on the surface, I’ve seen similar on high close automotive finishes normally a light polish will remove it. I recommend seeking advice from local French polisher.

Re the display... have you tried re-typing the speakers?

If that does not help, you could re-load firmware, but that’s more involved (but is coved in posts here on the forum).

Regards
Carl

861v6+ID40, HD621, 8000.2, 7200HC, 7200.2, SKYQ Silver, PS3, PDP-LX6090, QNAP TS870-Pro (8*6TB), Roon, iPadAir2.
[In Reserve] C15, MD600 (2*3TB), TwinStore RM (2*2TB)