This means a firmware update didn't complete properly, leaving the unit in a frozen state.
While firmly holding those two buttons, press the power button again.
Here’s exactly what’s fixed, how to update, and whether you should hit that “Update” button. denon avr x250bt firmware update fixed
If your receiver is behaving erratically even after a successful update, perform a and then update again:
Check my guide on How to Check Firmware on Any Denon AVR . This means a firmware update didn't complete properly,
Initiate the Update: Insert the drive into the front USB port. While holding specific buttons on the front panel (typically 'Tune +' and 'Tune -' while powering on, though check your manual for the exact sequence), the unit will enter "Update Mode."
Denon AVR-X250BT Firmware Update Fixed: How to Solve Update Loops, Errors, and HDMI Bugs If your receiver is behaving erratically even after
Press the button on the front panel to power off the receiver completely.
Before the latest firmware (version as of early 2026), many X250BT users reported a cluster of recurring problems. Understanding these issues helps clarify why the new update is a game-changer.