The document sensor(s) are dirty. Open the ADF top section and clean the inside of the ScanSnap.

Cause

Detecting documents becomes difficult because the document sensor(s) are dirty.

Solution

Documents cannot be scanned until the document sensor(s) are cleaned. Open the ADF top section and clean the inside of the ScanSnap.

For details about how to clean the inside of the ScanSnap, refer to the ScanSnap Help.

https://scansnap.com/m/