Hi Tất Đức,
Thank you for reaching out. Since the AI Answer has already covered the standard Surface troubleshooting steps, I'd like to suggest a few additional checks that may help narrow down the cause.
First, please check whether Windows is detecting the Type Cover at all. Right-click Start and select Device Manager. Expand Keyboards and Human Interface Devices, then look for entries such as Surface Type Cover, Surface HID Keyboard or HID Keyboard Device. If you see any of these devices, right-click each one, select Uninstall device and restart the Surface. Windows should automatically reinstall the drivers on startup.
You can also try manually installing the latest Surface Pro 7 driver and firmware package. Visit Microsoft's Surface Pro driver download page, download the package that matches your version of Windows, run the installer and restart the device after the installation completes. This can help if a Surface-specific driver has become corrupted or failed to install correctly through Windows Update.
In the meantime, if you need a way to type while troubleshooting, you can use the On-Screen Keyboard. Go to Settings > Accessibility > Keyboard and turn on On-Screen Keyboard or select the keyboard icon from the taskbar if available.
Additionally, could you let me know whether the touchpad is also unresponsive or if the issue only affects the keyboard? If you have access to another compatible Type Cover or Surface device, testing with a known-good keyboard can also help determine whether the issue follows the Type Cover or remains with the Surface itself.
Please let me know the results and I'll be happy to continue troubleshooting with you.
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