Your issue is from scanner assembly (part no. 090N00176), or cheaper from Contact Image Sensor assembly (part of the scanner, part no, 130N01679). You can try to disassembling the scanner (if you are a handyman, otherwise you need a tech) and to disconnect and reconnect the scanner flat cable and hope to solve the problem.
thanks for your reply. It's first time we post here and are happy to be helped.
Yes, we are able tio disassembly, but are very surprised that this issue occurs so suddenly.
Do you mean thta thses parts are out or that they simply need to be reconnected ?
Hello from France !
The Image Sensor can be removed by:
Remove the ADF.
Remove the Control Panel
Remove the A4 Middle Platen (with glass)
Unplug the ribbon cable from the Contact Image Sensor.
Release the tab and remove the CIS Guide
Slide the Contact Image Sensor out of the CIS bracket as indicated in the illustration