Error 1002 indicates that a device port is occupied.
In this case, you can try the following steps:
Restart the device and go to "My" → "About This Device" to check if the QR code is displayed.
If the QR code does not appear, it is likely a mainboard issue, and the mainboard may need to be replaced.
Try to restore the device to factory settings.
You can search for instructions on how to perform a factory reset in the search bar above.