Hi,
Did you try connecting your laptop to other display with HDMI ports?
Some tricks connecting the cable in order would work:
1. Connect first the DP to HDMI adapter to laptop (wait for 5-10 seconds, this procedure will detect what kind of video signal/resolution that will be supported before transmitted on the HDMI.
2. Connect the HDMI to DX70 HDMI input port indicated with laptop icon
Regards,
Ace