I can't find it when I connect the scanner

This situation to check the scanner's power supply, line interface is not good, and then determine the first to open the scanner, and then turn on the computer. If not, you can press refresh in Device Manager, and then see if the scanner has a self-test and the green LED is steady. If there is no problem, you can troubleshoot the scanner damage.

If you see the scanner's LEDs flashing all the time, the scanner is a problem, you can reinstall the scanner driver. In addition, in Device Manager, check to see if there is a conflict between the scanner and other devices, and if there is a conflict, modify it appropriately.