Press the button on the main unit to put the receiver into standby mode. Method 2: Updating via USB Flash Drive
: 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 .
Installing this firmware ensures optimal performance for your home theater system, resolving critical system vulnerabilities and stabilizing built-in streaming tools. Below is a complete breakdown of what the firmware achieves, along with a step-by-step walkthrough to update your hardware safely. Why This Update Matters txnr646 firmware update 2021
Are you planning to update via or a USB drive ?
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. Press the button on the main unit to
If your firmware number is different, an update is needed.
) throughout that year. These updates addressed evolving streaming standards that the no longer officially supported: Connect your receiver to the internet via an
I can provide the exact file checklist or targeted troubleshooting steps based on your current setup. Share public link
: Corrected song information display issues for Sirius XM radio .
For those still using the Onkyo TX-NR646 Go to product viewer dialog for this item.
No new security or feature updates were included.