If you're having trouble finding the firmware update on the Denon website, you can try using Google to search for the latest firmware:
: Download the firmware file to a PC and move it to a FAT16 or FAT32 formatted USB memory device. Initiate Update : Plug the drive into the AVR’s USB port. Navigate to Setup > General > Firmware > Update Start using your remote. Denon Avr X550bt Firmware Download- - Google
: 5 HDMI inputs, 1 HDMI output (with ARC), and Bluetooth streaming. If you're having trouble finding the firmware update
| Error Message | Meaning | Solution | |---------------|---------|----------| | | USB is not FAT32 or too large | Reformat to FAT32; use a 8GB or 16GB drive. | | "File Not Found" | Wrong folder structure | Extract the folder directly to USB root (no subfolders). | | "Update Failed" | Corrupt download or power glitch | Re-download the firmware. Retry the update. | | "HDMI Control Error" | HDMI-CEC interference | Disconnect all HDMI cables before updating. | | Receiver freezes at 0% | Bad USB port or drive | Try a different USB 2.0 drive (SanDisk Cruzer works best). | : 5 HDMI inputs, 1 HDMI output (with
In 99% of cases, a fixes these issues. However, finding the correct file for the X550BT can be confusing because Denon handles updates differently than other electronics brands.
To help you get the best performance out of your setup, let me know: Is your receiver currently ?