Allow the progress bar to reach 100% without turning off the car engine or cutting power. Once completed, the unit will reboot natively into the standard radio layout. Troubleshooting Common Boot Failures
This occurs when the unit has been reset and cannot find its software. The system plays music in the background, but the screen is locked to this full-screen error message. When this happens, the solution is to create and insert the correct software disc. nddn w56 76031 software map disc21
If you find this recovery process too tedious or want to permanently avoid this error, let me know: Allow the progress bar to reach 100% without