Test the physical or network connection
- Restart the scanner or all-in-one printer and the computer.
- For USB, reconnect the cable directly to the computer. For Wi-Fi, confirm both devices use the same network.
- Try the manufacturer scanning app before testing a third-party program.
Check Windows and Mac permissions
- On Windows, open Settings and confirm camera or file permissions are not blocking the scanning application.
- On a Mac, check Privacy & Security permissions for Files and Folders and the local network.
- If the scanner appears twice, remove stale entries and add the active device again.
Update the complete software package
- Download the full driver and scan utility from the manufacturer, not a general driver website.
- If an operating-system update recently installed, reinstalling the scan component may restore communication.
- Choose a save folder you can access and test with a simple PDF or image scan.
Stop guessing when the problem keeps coming back
Remote support can usually diagnose scanner apps, permissions, and network discovery. Physical feeder damage or a failed scan lamp needs hands-on repair.