Hi,
Please do try these troubleshooting steps that may help.
- First is to uninstall/reinstall the Wifi Adapter.
- Go to Device Manager and uninstall the wifi adapter.
- Once uninstalled, reboot the laptop and it should reinstall the driver automatically after the reboot.
- Do try connecting after the reboot and see if the same problem will persist or not.
- If it will still not work I would suggest running System Restore.
- Restore it back to an earlier date or time before you even changed the screen.
- Here's how to run System Restore:
http/windows.microsoft.com/en-PH/windows-8/restore-refresh-reset-pc