For a more reliable installation, especially if your Wi-Fi is unstable, use a USB flash drive .
The NR646 was one of the first Onkyo receivers to include Chromecast Built-in. By 2021, many users reported that casting would randomly drop or fail to start. The update and improved the discovery of the receiver on Wi-Fi networks. txnr646 firmware update 2021
Download the firmware file from the official Onkyo Support website. For a more reliable installation, especially if your
Only if your receiver is still connected to the internet and you see a notification. The update and improved the discovery of the
| Step | Action | |------|--------| | 1 | Check current firmware version (Setup → Miscellaneous → Firmware Update → Version) | | 2 | If below 21110-11010-1210, proceed. | | 3 | Disable “Network Standby” (to prevent Wi-Fi sleep during update). | | 4 | Remove USB drives, headphones, and other peripherals. | | 5 | Connect to a UPS (uninterruptible power supply) if available. | | 6 | Choose USB method for best results. | | 7 | Clear at least 1 hour where you won’t need the receiver. |