Symptoms
- Scan software doesn't detect the scanner
- Scan starts but never finishes or freezes partway
- Scanned file doesn't save anywhere findable
- Error connecting to scanner over network or USB
Likely causes
- CommonOutdated or missing scanner driverScanners need matching software to communicate with the computer.
- CommonScanner and computer not on the same network (for wireless scanners)Network scanning fails if devices are on different Wi-Fi networks.
- CommonScanning software crashed or needs updatingThe scanning app itself, separate from the driver, can also cause failures.
- PossibleUSB cable or port issueA loose or faulty connection interrupts data transfer during scanning.
- Less commonScanner glass or feeder issue physically blocking functionDebris or a paper jam in the feeder can stop a scan from completing.
What to do
- Confirm the scanner is powered on and, for wireless models, connected to the same Wi-Fi network as the computer.
- Check for a paper jam or obstruction if using an automatic document feeder.
- Reinstall the latest scanner driver and software from the manufacturer's website.
- Try a different USB cable and port if using a wired connection.
- Restart both the scanner and the computer.
- Try scanning through the operating system's built-in scan utility instead of manufacturer software, or vice versa.
When to call a pro
If the scanner hardware itself seems faulty (grinding noise, no light movement), a repair shop or manufacturer support can diagnose it.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.