Cannot connect retina MBP to Dell U2515H

Discussion in 'Mac Accessories' started by dennorske12, Feb 17, 2015.

  1. dennorske12 macrumors newbie

    Feb 16, 2015
    Hello all,

    I am at wit's end. I have a MacBook Pro Retina 15.4 mid-2014 2.8 i7 with a NVIDIA GeForce GT 750M 2GB... I am trying to connect to an external Dell Ultrasharp U2515H.

    I have two cables - which one should I use? One is an Apple Lightning cable, the other one came in the box with the Dell monitor - one end is a mini DisplayPort, the other end is a Display Port.

    When I plug the cable in the Mac and connect to the Dell monitor, I get the message "There is no signal coming from your computer" - I have selected the correct input source on the monitor. Nothing happens.

    What am I missing here?

  2. ra004e macrumors regular

    Jun 8, 2009
    Use the one that came with the monitor and plug it in to the DP port closest to the mini DP port. Also on my in the menu Display port 1.2 is disabled. I am using this monitor with 2013 rMBP 15" and am very satisfied.
  3. larrysing1963 macrumors regular

    Aug 16, 2014
    Exactly - use the other DP port. I had a similar issue on my Dell P2715Q - one port worked and the other gave me "no signal."
  4. dennorske12 thread starter macrumors newbie

    Feb 16, 2015
  5. broadbean macrumors 6502a

    Jun 10, 2007

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