Prime 4 The following peripherals did not com online during boot

Hey guys . i have a problem with my prime 4 since i tried to update it to the new software (1.5.2) nothing works anymore. I can only serve the screen. Hope someone can help me. I’ve already tried to reset to an older firmware, but that doesn’t work either. Thank you in advance for your help. sorry for my bad English

Hi @donkamillo87, welcome to the forum.

See here:

The following peripherals did not come online during boot - SMART CONSOLES / PRIME 4 - Official Denon DJ Forum

Try to update again by holding EJECT when powering ON. Otherwise contact support.