Bought a new monitor + this computer here. With HDMI connected, started computer message "no cable connection". A black screen. HDMI and the standard cable connected individually, same message. My first thought, monitor is defective. Lock him in at a console + another PC. The HDMI, because immediately wars image. PC returned. Get replacement. The same again. Also this PC connected to a different monitor. A black screen. Even those sent back. Come when you start the computer, unfortunately, in no menu. On the monitor only in HDMI, D-Sub o. DVI-D selection. All three selected. A black screen. So I make myself now on the search for a new PC. Hope I do not have even send the monitor back.