Receiving "No mPD cable" message when connecting my Mac Pro to Dell U2715H monitor

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Level 1

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Receiving "No mPD cable" message when connecting my Mac Pro to Dell U2715H monitor

I receive a "no mDP cable" message when connecting my Mac Pro Mid 2012 computer to a new Dell U2715H monitor. I have a Mac Pro mid 2012 computer with OS X 10.10.5 with two 2.4 GHz 6 core Intel Exon processor and an ATI Radeon HD 5870 video card.

I replaced the mDP to DP cable that came with the monitor and still receive the "No mPD cable" message on the Dell monitor. I also tried the second mDP port on the video card with no success. I inserted the cables several times to ensue a proper connection was made. The Dell computer appears to work as it shows the error message on the screen.

My second monitor, a Samsung S27D390, works fine using either mDP port using a mDP to HDMI cable.

Any suggestions?

Thanks

Mac Pro, OS X Mountain Lion (10.8.2)

Posted on Sep 21, 2015 12:16 AM

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Answer 1

Best reply

lllaass

Level 10

210,411 points

Sep 21, 2015 8:37 PM in response to Terry31

Seems like a defective monitor since you tried two different cable.

Does the mDP input on the monitor work with another computer?

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Answer 2

Sep 21, 2015 8:38 PM in response to lllaass

Use caution with DisplayPort, as that display has a DisplayPort OUTPUT as well:

DisplayPort 1 Mini DisplayPort
1 DisplayPort (v 1.2)
1 DisplayPort Out (MST)

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Answer 3

Terry31 Author

Level 1

5 points

Sep 22, 2015 11:36 AM in response to Terry31

Thanks for all of the replies.

Dell did not describe in its set up instructions was to check the on screen display for in put options. The one automatically selected was mDP which was not correct. It needed to be DP. With the correct setting everything is working correctly.

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