Area-51 R2, no video or USB

My Alienware Area 51 R2 is has a backup from a UPS. Recently my UPS had an issue, after solving it, the Alienware is not sending any video nor USB signal. It power ups (I can see the lights on, and hear the HDD and DVD sound), but I can´t see any video, the keyboard looks like its OFF. Both video and other devices work on other PC.

Please, help! T_T