I have 2017 MX with MCU2. No sound from infotainment so I did a soft reboot, but it never came back. Tried rebooting multiple times (up to 3 minutes of holding the buttons) but still have black screen. I can drive and it appears to charge when plugged in, but I cannot connect to car through app so I cannot confirm. The heat is on and won’t turn off! Car heats all night. Requested service but they scheduled me for two weeks out. I am considering a hard reboot by disconnecting 12v battery, but am concerned because instructions state you should power off car before doing hard reboot and I can’t do it since screen is dead. Looking for guidance on what to do? Thanks!