No Entertainment or HUD SOS!

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2018 Mazda CX-9 GT
Got into my car and noticed my entertainment system wouldn't start. I tried the Mute / Nav / Back reset and that didn't work. Further more my backup camera didnt work either, then after some more checking the USB for android auto had no power and my HUD was also off.

Anyone have this happen to them?
 
First thing I would try is disconnecting the battery, waiting a little bit and reconnecting the battery, this forces a reset.

If that doesn’t work then the next steps would be to check the fuses. There is a fuse diagram in the owner manual, and you can test it by swapping the fuse with a good one from another system.
 
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2021 CX-9 GT
This happened to me. Apparently the infotainment can be completely turned off. Not sure why mine turned off but to do it, press and hold either the command wheel or the volume/mute button for 15 seconds - it was a while ago, can’t remember which button.
 
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