M1 Battery Not Charging via Thunderbolt

Zenioz wrote:

Hello, I have Philips 279P1 external monitor connected solely by a Thunderbolt 3 cable to my MacBook Pro (13-inch, M1, 2020)• . It is supposed to provide enough power for the MacBook to operate and charge its battery, which it has for the past few months.

Today, I am not able to get the MacBook's battery to charge with this setup anymore. The screen acts perfectly fine as a secondary monitor with both image and sound, but alas no charging.

I have tried the following to no avail:

Closing any apps that consume too much power.

• Restarting the MacBook.

• Shutting down, waiting a few minutes, and rebooting the MacBook.

Disabling the "Optimised battery charging"• options in preferences.

• Restarting the monitor.

• Resetting the monitor to its initial settings.

I'm on macOS Monterey v12.0.1 (21A559)

Any ideas as to how I can resolve this?

Thanks in advance.

I would power the Mac directly with the appropriate charger, this will bypass any issues.

Find the right power adapter and cable for your Mac notebook ...

https://support.apple.com/en-us/HT201700