Alersch, I've came across the same issue when setting up the box. What worked for me was to pull-off the power cable and all the USB cables too -- box was completely de-energized -- and then gave the box 30 seconds of complete idle... Afterwards it started once again.
I removed drive, mem and cables. Let sit for 8 hrs. put back together no change, LED goes to green, nothing more.
Tried various combos of cables, drive, mem. NOTHING.
Sorry to hear you are having problems but let me help you.
I know these are very basic steps but just in case check the monitor cables, test different adapter (if using one), test the system with just one RAM stick and if you can access Bios, try setting defaults by pressing F9 key.
If you have tried plus the steps you mentioned before, I recommend you contacting the place of purchase or your Intel® Local Support for a possible replacement.