Connect to the Mini-USB Service port on the back of the DM920UHD and Putty to enter with the Putty Terminal in Serial mode (from your PC) into the bootloader. It looks like you corrupted something in the box. Naturally your box MUST be connected to the Modem/Router with a RJ45 cable (try to remove and reinsert to see if it gives you an IP address).

If you want I could access your box with Teamviewer 14.x, you need to execute the install file as for private use (not install) and give me the ID+PIN/Pass (via PM naturally), before you will need to have the Putty connected with the mini-USB cable to the box with your computer, and access to the terminal/DM920UHD. I will re-apply the bootloader update that seems to have gone wrong.

Teamviewer : http://www.ourdreambox.com/Teamviewer/TeamViewer_Setup_14.2.2558.exe

Admin
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