Dell Xps 15 L502x HDMI Issues

Hi.

I have issues to connect to my projector. 

I tried with another computer and both the HDMI cable + Projector works. The problem lies with the Dell XPS L502x

The problem is that when i connect, the projector blinks and laggs untill it goes black and then blinks for 1 sec and lagg for 1 sec then goes black again.

Since XPS 15 L502x doesn't have VGA port, i need to connect using HDMI.

I have the latest update of BIOS, since i googled the problem, but it didnt help to get that update.

I'm very sorry for not getting the HDMI to work. That means i have no possibility to connect to anoter screen.

I'll be happy for whatever you got. Sorry for bad english :)