The original manufacturer, Nortek, has largely pivoted to subsea and scientific instrumentation. For support regarding older consumer "HD Box" products, users often rely on community forums or legacy software archives like those found on Nortek Group's legacy support or independent firmware repositories. Nortek Software
3.3 Application layer and UI
The firmware package identified as nortek-hd-box-r1-hdmi-firmware is the low-level software controlling the device's hardware logic. nortek-hd-box-r1-hdmi-firmware