RJ-4040 FAQs & Troubleshooting RJ-4040 Not your product? Sort by Updated Date Popularity 4 Results 1. 18/10/2023 Printing is not possible. (USB connection) 2. 22/10/2020 A communication error occurs when printing via serial cable (RS-232C). 3. 21/05/2020 I have an occasional printing problem. 4. 12/11/2012 Suddenly my print server stopped printing. Connecting to a Computer FAQs & Troubleshooting