SYN3 3.4.22251 ERROR

So, if this were me my next steps would be:

  1. unplug everything from the USB ports
  2. disconnect the battery for 30 minutes
  3. reconnect the battery
  4. start the car and do a master reset
  5. when it comes back up try again

If it still has the problem I would then replace the USB media hub.

Cheers for that, I will give it a go, the master reset just hangs so far when selected, even after multiple soft resets, maybe unplugging the battery will help.