MacBook Air M2 external display goes black with USB-C adapter

I have a 2022 MacBook Air M2 and an original Apple USB-C to Digital AV multiport adapter, which I use to connect my Mac to external monitors and projectors via the HDMI port.

Everything works fine for about twenty minutes, then the monitors or projectors I’m connected to automatically go black. The monitor/projector still appears to be connected to the MacBook but isn’t displaying the screen.

This happens in both mirroring and extended display modes.

I’ve tried both USB-C ports on the Mac with various monitors and projectors, as well as with different HDMI cables, but I’m experiencing the same issue with all of them.

How can I resolve this problem?

Posted on Sep 23, 2026 3:39 AM

1 reply

WheelieNick

Level 9 (74,110 points)

Oct 22, 2026 12:59 AM in response to Corpo_75

Hi there

If you have tried it with a direct cable instead of a multi port device and the issues are also occurring, please try this

MacBooks running Apple silicon can mismatch refresh rates with certain adapters or displays over time, leading to a blank screen.

Open System Settings > Displays on your MacBook.
Select your external display.
Change the refresh rate from default settings down to 60 Hz or 50 Hz.

2. Disable Monitor Eco and Deep Sleep Settings

Many modern monitors and projectors enter an automated low-power state or handshake reset after a period of inactivity or signal handshake checks.

Open the On-Screen Display (OSD) settings using the physical buttons on your monitor or projector.
Turn OFF features like "Smart Energy Saving," "Eco Mode," "Deep Sleep," and "Auto Standby".