What should I do if the ASUS S550CM series keyboard cannot input?

Please press F8 when the ASUS screen appears on boot to enter safe mode and check whether the keyboard can work normally.

ASUS S550X3317CM-SL(4GB/500GB)

If you enter safe mode Can be used:

 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 notebook to the service center and ask an engineer to do a detailed inspection.