Dell Monitor (S2722QC) keeps losing signal from Mac Mini M2
I have had my Mac mini M2 connected USB-C to USB-C to my Dell 27" 4K UHD USB-C Monitor S2722QC since October and encountered no issues with it until today.
The Dell monitor keeps losing signal from the Mac. It has no issues recognising it again when I wake it up with the keyboard or mouse, but after a varying amount of time (seconds to minutes), it loses it signal again producing the message "No signal.... It appears random with no specific actions making it lose signal.
I initially tried multiple resolutions which seemed to be common with the flickering issues experienced with Dell monitors and Macs including:
- Changing to a HDMI to HDMI cable
- Making Dell Monitor Menu Changes;
- Resetting all factory settings
- Display~USB-C Prioritisation ~ High Resolution
- Others~ DDC/CI~ Off
- Others~ LCD Conditioning ~ On
- Changing brightness to 66%
- Changing contrast to 90%
- Making Mac Display Settings changes;
- Turn on Dark Mode
- Resolution~ Default for Display
- Refresh Rate~ 60 Hertz
- System Preferences~ Displays~ Night Shift~ Schedule~ Off
- Colour profile~ Generic RGB Profile (tried multiple different RBG modes too)
- Turned off any Night Mode.
- Changed the sleep settings to never.
- Turned the monitor off and on again from the plug.
- Updated the Mac mini to the latest MacOS Sonoma 14.4
- Restarted the Mac mini
- Removed all USB devices from the monitor
I've looked into a firmware update on the Dell monitor itself, but I don't know which operating software to choose as it gives no option for a Mac.
Interestingly, I connected my MacBook Pro 13-inch, 2018 to the monitor using the same USB-C cables, and NO problems?!? Have had a look at the display settings on the MacBook Pro, but these are all the exact same as what I have set on the Mac mini!
Please tell me what is going on and how I can fix this!!! I'm honestly at my wits' end.
Mac mini, macOS 14.2
