Have you tried navigating directly to the devices IP address with your web browser?
Have you done a full reset, like with a router?
1.Hold in the reset button for 30 seconds,
2.unplug the power while continuing to hold the reset button for an additional 30 seconds,
3.Plug the power in continuing to hold the reset button for an additional 40 seconds,
4.Then release the reset button and wait 3 to 4 minutes for it to boot up.