Alternatively, switch to to completely bypass the network hardware. Update Trapped in an Endless Loop
The most recent official firmware update released specifically for the Onkyo TX-NR646 was issued on December 1, 2020 (Firmware Version: 1110-6060-1106
Users attempting to pass 4K 60Hz signals from newer gaming consoles (PlayStation 5 and Xbox Series X) or high-end PC GPUs often encountered "handshake" failures—a frustrating scenario where the TV would go blank or show static because the receiver couldn't authenticate the high-bandwidth signal fast enough.
: Long-time owners strongly recommend avoiding network updates (WiFi/Ethernet). Many users on Reddit reported "bricks" or endless "Now Initializing" loops when updating over the air .
: Resolved an issue where users couldn't change customer settings via the web setup menu. txnr646 firmware update 2021
: Fixed the bug where song and artist information failed to display on the receiver's screen. ⚠️ Critical Precautions Before You Begin
specifically did not receive a new update that year. Its final official firmware release was version , which arrived on December 1, 2020 .
Ryan spent the morning reviewing the code, checking for any bugs or potential issues. He worked closely with his colleagues, double-checking every detail. As the morning wore on, the team conducted a series of rigorous tests, simulating real-world scenarios to ensure the firmware performed flawlessly.
Connect your receiver to the internet via an Ethernet cable or Wi-Fi. Press the button on your remote. Navigate to System Setup > 8. Misc > F/W Update . Select Update via NET and press Enter. Alternatively, switch to to completely bypass the network
Updating firmware carries a risk of bricking your device if interrupted. Follow these rules strictly:
Wait until the front panel display reads before touching any controls.
: Optimizes the stability of object-based DTS:X audio tracks when decoded from Blu-ray or high-end streaming boxes.
: Fixed a bug that prevented song information from displaying correctly for Sirius XM radio. Many users on Reddit reported "bricks" or endless
If your Onkyo TX-NR646 is still running the December 2020 firmware, there are no newer official updates available beyond that version. Onkyo confirmed that 1110-6060-1106 is the for this model, and it has since been removed from official websites.
HDMI-CEC/ARC settings reset to defaults. Fix: Go to Setup → Hardware → HDMI → Set HDMI CEC to On and Audio Return Channel to Auto.
Extract the ZIP file and copy the contents to the root directory of a FAT32-formatted USB drive.