Never use cheap non certified cables or adapters with DisplayPort video cards, motherboards, laptops or monitors.
Follow these steps to disable DP1.2 on the U2414H with NO signal input Buttons = Preset, Brightness, Menu, Exit, Power When you press the Menu button, the …

In contrast, DisplayPort is the display equivalent of Ethernet….anyone can implement it in any type of application. Newegg shopping upgraded ™ Whether for work or for play, the Dell UltraSharp™ U2412M can deliver an unmatched viewing experience. DisplayPort supports higher performance as a standard feature-every 6-foot cable supports 10.8 Gbps. DisplayPort to VGA Adapter, Benfei DP DisplayPort to VGA 6 Feet Cable Male to Male Gold-Plated Cord Compatible for Lenovo, Dell, HP, ASUS and Other Brand … So, i switched to DVI and voila, everything works like a charm! They are known to have tons of issues: ONLY buy certified cables from known manufacturers. This should work, shouldn't it? Happy as a lark , i set everything up with the Displayport cables, powered on my PC and what do you know, just a tiny window which says no connection detected and going into power-saving mode in 5mins. Message on monitor says No DisplayPort cable. Also, you should avoid Ebay: it's filled with bad cables or fake / gray market cables. Buy Dell UltraSharp U2412M 24" Full HD 1920 x 1200 60Hz 8ms DisplayPort VGA DVI-D 4xUSB 2.0 Pivot Swivel Height Adjustable LED Backlit IPS Widescreen LCD Monitor with fast shipping and top-rated customer service. I have been trying to connect my U2412M as monitor using its DP port to my new HP Envy laptop using its HDMI port with CableMatters HDMI to DP cable. In addition I've tried with and without USB cable. Tried another cable and two other laptops with same result. A VESA compliance program ensures interoperability for products featuring the "DisplayPort Certified" logo. Clearly outstanding: watch your graphics come to life on a vast 24" (61 cm) LED-backlit screen featuring a crystal-clear 1920 x 1200 resolution on a 16:10 widescreen aspect ratio so you can’t lose screen area just because your customised applications support a different resolution. So i just got the Dell U2412M and additional Displayport to Displayport cables.