If the touch screen of your Acer Chromebook is not working then you can try the mentioned troubleshooting steps to resolve the hassle without any technical assistance.

• Make sure there is no dust on the touch pad
• Drumroll your fingers on the touchpad for ten seconds
• Touch the esc key several times
• Turn off your Chromebook and then back on again
• Delete account that has the problem with touchpad, re-add the account
• If nothing works, replace the touchpad