Nortek-hd-box-r1-hdmi-firmware |link| Official

For these generic Android boxes, "over-the-air" (OTA) updates are rare. Manual updates typically involve: Finding a ROM

The open-source community has recently reverse-engineered the flashing protocol. There are now GitHub repositories hosting "unsigned" firmwares that unlock: nortek-hd-box-r1-hdmi-firmware

If you are looking for this firmware to resolve an issue, the following steps are recommended: For these generic Android boxes

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3. HDMI Over IP Hardware (Nortek Global HVAC / Professional AV)

Are you looking to because the HDMI output has failed?