Surface Pro 3 shows a black screen that says American Megatrends

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On Surface Pro 3 and earlier devices, a black screen may appear with American Megatrends at the top. The screen contains configuration options for the Trusted Platform Module (TPM) settings.

American Megatrends TPM security options screen

This screen may also appear after a recovery or reset of your Surface. It tells you that a TPM configuration change was requested.

Important: You’ll need a keyboard to continue.

If you see the American Megatrends TPM screen on your Surface, follow these steps:

Press F12. (If you’re using a Surface Type Cover, press Fn + F12.)

This will keep your current TPM settings, and your Surface will continue to Windows.
After Windows starts, install the latest Surface and Windows updates to help prevent future problems. For more info, see Download drivers and firmware for Surface.