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Dell U2715H DisplayPort Not Working [SOLVED]

Dell U2715H

Having problems with your new Dell U2715H monitor using DisplayPort? Here are the most common problems & solution for the Dell U2715H monitors.

Dell U2715H Won't Detect DisplayPort Input


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One of the main weird feature of the Dell U2715H is that you MUST enable the DisplayPort 1.2 option in the monitor menu before being able to daisy chain DisplayPort monitors. This is one of the major reason that people have problems with this monitor.

U2715H bezel menu buttons

Using the buttons on the bottom right of the front bezel (image above), go in the "DISPLAY SETTINGS" of the monitor menu and select "DISPLAYPORT 1.2", then "ENABLE". That should enable the monitor for use. If it doesn't, try the other suggestions below.

Dell U2715H enable displayport monitor menu
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Since monitors are consistently updated with new firmware and On-Screen-Display (OSD) menu systems, it could look slightly different then this. You may, like in this example below, also have to select "DisplayPort" as the INPUT for that monitor (choose "DISPLAYPORT" in the "INPUT SOURCE" menu):

Dell U2715H OSD menu

Other Possible Dell U2715H Problems & Causes:

Cable connected to the wrong DisplayPort input

Your cable MUST be connected to any of the two DisplayPort IN port (NOT "DisplayPort out"). Many monitors will have both a Mini DisplayPort and a standard DisplayPort input port. You may connect them in any one of those two. Refer to your monitor manual for more details.

Note: The DisplayPort OUT port is meant to DAISY-CHAIN many monitors together, if your video card & motherboard & monitors support it.


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Note: If there is only ONE DisplayPort, then it will be a DisplayPort IN.

Dell U2715H DisplayPort connectors

Cheap DisplayPort cables WILL give you trouble

Never use cheap non certified cables or adapters with DisplayPort video cards, motherboards, laptops or monitors. They are known to have tons of issues: ONLY buy certified cables from known manufacturers. Also, you should avoid Ebay: it's filled with bad cables or fake / gray market cables.


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Activate the monitor within Windows settings

You must activate the new monitor from within Windows & use the "Extend Mode" on it.

DisplayPort not detecting when waking from sleep

Some people have reported that the monitor doesn't power up when you wake your computer from sleep. In that case, just turn the Dell U2715H OFF and then back ON. It should detect it now. This is probably a firmware issue, check on Dell website if there are any updates available for your monitor.


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Are both ends of the DisplayPort cable connected?

Even the pros do this. Make sure to connect one end of the DisplayPort the cable from your video card, motherboard or laptop and the other end to the DisplayPort IN port of your monitor.



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