Skip to main content

Fix Your Stuff

Right to Repair

Parts & Tools

Model A1990 / EMC 3359. Released in May 2019 with new 6-core and 8-core processor options.

14 Questions View all

MBP stopped detecting external display, DisplayPort over Thunderbolt 3

External monitor is a Dell U2718Q. Message on the monitor says “No DP signal from device”.

This worked pretty seamlessly for awhile, but it stopped working entirely. I’ve tried powering off both monitor and laptop, updated to latest MacOS, tried different USB-C ports on the laptop, different DP ports on the monitor, reset SMC, PRAM, NVRAM. Still doesn’t work. Any suggestions?

Answered! View the answer I have this problem too

Is this a good question?

Score 0

Comments:

Do other USB-C/TB3 devices work on your system?

Did you try another display to see if the issue is with the display Vs the system.

by

Add a comment

Nintendo Switch Kits

A quick fix to get back in the game

Shop Switch Kits

Nintendo Switch Kits

A quick fix to get back in the game

Shop Switch Kits

1 Answer

Chosen Solution

I haven't tried other devices. I did find a workaround though: I have a TB3 - USB/USB-C/HDMI dongle. So plugging the monitor DisplayPort into the dongle via the DP/USB-C cable that I was using didn't work. However, I then plugged monitor HDMI into the dongle, and it's working seamlessly again. I think this suggests that the DP/USB-C cable maybe went bad.

Was this answer helpful?

Score 0
Add a comment

Add your answer

kphill will be eternally grateful.
View Statistics:

Past 24 Hours: 1

Past 7 Days: 6

Past 30 Days: 13

All Time: 36