Infotainment center dead after Waiting for Update Media appears

While driving the update media waiting window appeared, and after a couple of restarts it stayed on. Came home and plugged into charger and after about an hour screen went black. Back in 2017 did have android auto update (waiting for update media was a symptom listed in the fix). Now usb ports are not charging either (nothing but a cord was plugged in usb when this happened). Nearest dealer is about 70miles...Have not had any previous related issues....Am considering disconnecting the 12v battery for a while in an attempt to reboot. Found the thread Bricked MyLink describing same symptoms, but beyond go to dealer no solutions.
Suggestions?
Thx
Floydo