I pulled my 4100NEX today to replace the Android cable to try to get it to work with Android Auto. I have a new Samsung Note9 phone with a USB-C connector, and I've read that the phones are fussy about what kind of cables you use for Android Auto.  I tried a couple that I had around the house last week and they didn't work, so I picked up a couple different USB 3.1 Gen 2 cables last night. I pulled the radio out of the dashboard, and when I turned it on, it seemed to take a little longer on the Loading screen. It then went to the Warning screen, but I get no response to hitting OK. Can't get past that screen. As far as I can tell I didn't pull any wires loose. Pulling the radio out last week and putting it back didn't have this problem. Any ideas what happened, and what I can do about it?

Thanks!

UPDATE: I did a factory reset (paper clip in the small hole lower right corner). Radio apparently did reset, as it came up on a screen saying I need to enter the password. I know the password, so I clicked OK to get to the input screen. Nothing. The screen seems to not be responding to touch. Is there anything I can do, besides sending it in for repairs?

Try holding down mute button until screen changes...