M1 Macbook Pro 13 internal or exteral keyboard not functioning

skibum70 wrote:

It appears that with Macos Sonoma security is setup to disable usb devices (keyboard and mouse) before login. So as the internal keyboard and trackpad are broken there is no way of using an external one without doing a clean setup and then changing the security setting.

Solution

I'm going to replace the internal kayboard and trackpad so the user can access their data.

External USB keyboard is available for Startup Options screen & Recovery—

not for the macOS until you log in and approve the keyboard...

skibum70 wrote:

Internal keyboard not responsive (no backlight or Caps lock light). Trackpad not responsive. (neither in normal mode - safe mode or recovery mode) I plugged in a USB A Apple Keyboard and mouse (with A - C adapteur) External keyboard not responding. Still can't type in password to login. In recovery mode external mouse functions.

you can trouble shoot further

—A SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies

Does a quick disk repair before it fully boots up, and certain system caches get cleared and rebuilt, third party system modifications and system accelerations are disabled temporarily.

Login and test. Reboot as normal and test. Caches get rebuilt automatically.

no insight or resolve—

In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment

Make an appointment for a "hardware issue"

Genius Bar Reservation and Apple Support Options - Apple

Outside the USA

Contact Apple for support and service - Apple Support