I have a YouView box, which runs on embedded Linux. The file-system is encrypted and there are only USB/HDMI ports on the rear (no serial ports). Pressing shift on boot doesn't provide me with any usable menu (Grub or otherwise). I've replaced the HDD with an Ubuntu install, no joy. I think the YouView bootloader has maybe been flashed to EPROM.
Has anyone ever managed to reprovision a Linux set-top box with Ubuntu? It's a long shot, but given that I own the box, I'd hope to be able to install my own OS on it. Any tips?