Hi,
Here are some troubleshooting steps that may help in solving the issue.
- First is to connect an external USB keyboard and see if it will work or not.
- If the external USB keyboard will work that could mean that the built in keyboard is faulty already.
- Try to uninstall/reinstall the keyboard driver.
- Go to Device Manager and uninstall the keyboard driver.
- Once uninstalled reboot your laptop and it should reinstall the driver automatically.
- After the reboot do test it again and see if the same problem will persist or not.
- If it will not work your last option would be to reinstall Windows.
- If reinstalling Windows will not work that confirms it that the built in keyboard needs to be replaced.
Here's a replacement keyboard for your laptop.
http/www.amazon.com/Keyboard-Without-MP-12K13US-9201W-0KNB0-1104US00-AEEX2U01110/dp/B00MVOWXRG