I have a Alienware 13 R2. No matter what I try no hdmi output comes out of the laptop.

The laptop comes with an Intel HD Graphics onboard and a Nvidia GPU. It seems the video output always comes out of the Intel HD Graphics - the Nivia is only used for graphics processing per application. 

There is a mini display port which works fine with TV and monitor. But the HDMI port besides it shows no signal.

Install/reinstali drives done extensively. Changed HDMI cables to no avail. Changed HDMI ports to no success. Changed monitors fand TVs too. Same hing: no HDMI signal.

When the HDMI cable is connected to the HDMI slot on the backos the laptop, the TV/monitor screen goes black like it knows a cable went in. But no signal is detected.

Any suggestions?