Nortek-hd-box-r1-hdmi-firmware __full__
Perform a "hard reset" by unplugging both the TV and the Nortek box for 60 seconds. This forces a fresh HDMI handshake when they reboot.
If your Nortek box is an HDMI encoder/streamer, it likely has a web management portal. nortek-hd-box-r1-hdmi-firmware
It is annoying that the box shipped with this bug, but the firmware update is a permanent fix. If your Nortek R1 is collecting dust because of HDMI issues, spend 5 minutes on this patch. It saves you from buying a new streaming box. Perform a "hard reset" by unplugging both the