When Intel IEI Tank 870 is first powered on, it is not booting up. The message getting is given below
"Reboot and select proper boot device
or insert boot media in selected boot device and press a key"
I hope Tank 870 is pre installed with Ubuntu OS . Could you please help
The tank might not have shipped with Ubuntu pre-installed. The best way forward is to create a bootable USB drive (with Rufus or similar software). I'd recommend installing Ubuntu 16.04. If you're not sure what you want, use ubuntu-16.04.5-desktop-amd64.iso (iit should be the one at the top).