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jabran Author

Level 1

9 points

Dell ultrasharp 38" intermittent display detection

I have a MBP (16" 2019) connected to an Dell external monitor via USB-c. Any time the computer sleeps and wakes up the signal is not detected but I managed to work around this by not allowing computer to sleep when plugged in. A more serious issue is that the monitor will sometimes get locked into a cycle where it will intermittently lose signal on a roughly 1 minute cycle. It appears to be related to whether the battery is fully charged or not. This is particularly annoying because the USB-c connection is meant to also power the machine. Dell is unwilling to provide support for their device and suggest seeking solutions on this forum.

Posted on Jun 5, 2020 8:44 AM

Top-ranking reply

karina184

Community Specialist

Posted on Jun 8, 2020 8:35 AM

Hey jabran,

I see you're having trouble with an external monitor not being detected, especially when waking the Mac from sleep.

Try resetting the SMC, which can sometimes help with power-management issues like this. Here's how to reset the SMC: How to reset the SMC of your Mac - Apple Support. Also, try the steps here to help with the connection issues that you're having: Get help with video issues on external displays connected to your Mac - Apple Support.

Have a great day.

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Dell ultrasharp 38" intermittent display detection

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