Originally Posted by e92V8
A couple of times recently when I've hit bumps the iDrive screen has reset itself, displaying the BMW logo, and then worked fine afterwards. Today I went over a speed hump and the unit blacked out. It's been out for the last few hours and the fuses appear to be fine. I thought it may be a loose connection.
Likely a short somewhere.
In the meantime, press the volume knob in for ~30 seconds to reboot. See if this works.