Updating firmware is a critical process. To avoid "bricking" your unit, follow these precautions:
Once finished, "Complete" will appear on the front display, and the unit will return to its normal state. 3. Update via USB Memory denon avr x4000 firmware update upd
A FAT16 or FAT32 formatted USB stick with at least 2GB of space. Updating firmware is a critical process
Choose Check for Update . The AVR will communicate with Denon's servers. follow these precautions: Once finished