HL-L6400DW FAQs & Troubleshooting HL-L6400DW Not your product? Sort by: Updated Date Popularity 4 Results 1. 27/11/2018 After the selected tray is out of paper, the Brother Machine prints by different paper size and paper types from another tray. 2. 22/11/2018 Install the optional lower tray 3. 18/03/2016 Install the Tower Tray Unit. 4. 18/03/2016 Install the Mailbox. Product Setup FAQs & Troubleshooting