First thing to do is not panic. Normally there is a simple solution, so check the basics first:
Check the plug (power supply) is properly seated in the mains socket. Swap to another socket or plug in a lamp to double check. At the other end of the lead, make sure the round plug is securely attached to the DROIX.
From here, move on to the video cables, again checking at both ends of the HDMI cable to ensure the DROIX and TV or monitor both have a proper connection present. If possible, try a different HDMI socket on your TV, or temporarily connect the DROIX to a different TV. If you have an HDMI cable from a Sky box, BluRay player etc then swap it for the DROIX’s to see if that helps.
If all of the above have been checked, and your TV is set to view the HDMI input socket that the DROIX is attached to, please do let us know what is happening (including the status of any LEDs) via support@DROIX.co.uk including your order details.