ASUS S400CA series keyboard cannot input, please press F8 when the ASUS screen appears when booting, enter safe mode, and check whether the keyboard can work normally.

You can use it if you enter safe mode:

< p>　1) Please upgrade the BIOS to the latest version.

　2) If updating the BIOS cannot solve the problem, please upgrade the ATK0100 driver.

If it cannot be used after entering safe mode:

Please send the laptop to the service center and ask an engineer to do a detailed inspection.