Network scanner (Brother MFC-L3750CDW) not visible from simple-scan 3.36.3 (Ubuntu 20.04.1 LTS) from one computer but visible from another ?
I am using Brother MFC-L3750CDW network printer-scanner on my local network of 2 ASUS Vivobook computers. On top of these there is the latest version of Ubuntu 20.04.1 LTS 64 bit with the latest updates. My problem concerns the "Document scanner" application (version 3.36.3 on both computers). On one of the computers, when the application starts up, the search for devices automatically displays "ESCL Brother MFC-L3750CDW series" and the application is ready to scan (scan tested: OK). On the other computer, the search for devices fails and I get the message "No scanning device was found". The two computers are connected to the same network. Network printing to this printer works fine. How can I debug that problem please ?
Thank you in advance for your help.