The solutions to ASUS S400CA series touchpad failures are as follows:

1. The touchpad does not respond and the pointer does not move

Press FN+F9 or press the shortcut key to turn on the touchpad or restore the BIOS default settings. If the problem is not resolved, contact the ASUS service center for testing.

2. Single-click or double-click on the touchpad does not work

Turn on "Tap instead of keystroke" or back up data and try reinstalling the system. If the problem is not resolved, contact ASUS service center for testing.

3. The left and right buttons under the touchpad are invalid

Whether the functions of the left and right buttons are reversed:

Yes, change the left and right hand preference settings .

No, contact ASUS service center for testing.

4. The calculator function fails (some machines)

Press FN+F9 or press the shortcut key to open or install the Touchpad Extra driver. If the problem persists, To solve the problem, contact ASUS service center for testing.