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You can check your current version by pressing on the remote → going to Setup → Miscellaneous → Firmware Update → Version .
If your receiver suffers from the common Wi-Fi drop-out issue, updating over the network is risky. A sudden drop in internet connection can corrupt the installation. Use a USB flash drive for the safest results. Step 1: Prepare the USB Drive
You can update your Onkyo TX-NR646 using either a direct internet network connection or a local USB flash drive. Method 1: Network Update (Recommended)
Ensure your household power is stable. Power loss during an update can corrupt the receiver. Step-by-Step Installation Methods txnr646 firmware update 2021
: Press ENTER to start. Once "Completed!" is displayed, remove the USB drive and power the unit off and on. Troubleshooting Tips
: General minor bug fixes to ensure the receiver remained reliable as a legacy device. Why People Searched in 2021
Note: If the option is grayed out, wait a few minutes for the unit to fully initialize. . You can check your current version by pressing
: Patches minor decoding issues and enhances handshaking with modern DTS:X media sources.
The 2021 firmware refined the HDCP (High-bandwidth Digital Content Protection) keys and improved the EDID (Extended Display Identification Data) management. While no firmware could physically upgrade the HDMI chips to 2.1 standards, the update optimized the signal processing algorithms. This resulted in greater stability for 4K HDR content, ensuring that the receiver remained a viable hub for modern home theaters rather than a bottleneck that required users to plug devices directly into their TVs.
occurred just as 2020 ended. This update focused on internal stability and web-based control: Use a USB flash drive for the safest results
Users on the latest firmware have reported that the previous manual method to enable "HDMI 4K Enhanced" (using the BD/DVD + Power buttons) may no longer work as it did on older versions. for the manual USB update file or troubleshooting steps for a failed update? Firmware Updates | ONKYO Asia and Oceania Website
If you are experiencing specific errors (e.g., "Update Fail") or need help checking your current firmware version, let me know! I can help you: on your display Troubleshoot the USB update method Explain the "8.1 F/W Update" menu
You can update your receiver using two methods. If the "Update via NET" option is greyed out, it typically means your unit is already up to date or has a network connectivity issue.