How to use "keyboard" in a sentence

She managed to break the grip of fear that had paralyzed her, and she put her fingers on the keyboard

She hesitated, fingers on the keyboard, not certain if she should proceed

But when she attempted to type in her instruction, the keyboard was locked; the keys wouldn't depress.

But the keyboard remained frozen.

The man at the computer suddenly turned to the keyboard and started typing.

The man cried out, pushed his wheeled chair away from the keyboard, and thrust to his feet