Dell 4320 HDMI port

I recently bought a dell 4320, and the HDMI port has been giving me problems, I've connected multiple devices, and I just don't know what is wrong with it anymore.  My laptop does not recognize anything(I've tried fn+f8, fn+f4, win+p, but it acts as if it's not even plugged into anything, even though it works with my TV just fine.) when I plug it to HDMI, also my PS3 doesn't show a display on the projector connected with HDMI. I assumed it was the HDMI port, but it works with my WII U, and Blu-ray player perfectly.