Epson Expression 836XL User Manual page 74

Incorrect operation of your scanner software
If an error occurs, check the scanner's indicator lights. See
Indicator Lights to determine what kind of error it is, and try the
suggested solutions. If that doesn't solve the problem, see
Problems and Solutions.
See the documentation that came with your software,
computer, and printer for other possible solutions.
Troubleshooting Page 74