RJ-4030 FAQs & Troubleshooting RJ-4030 Not your product? Sort by Updated Date Popularity 3 Results 1. 04/12/2023 Where can I find my Brother printer's serial number? 2. 05/22/2020 When I print a long label or many labels continuously, printing suddenly stops. 3. 10/28/2019 The printer automatically turns off when not used for a while. Machine FAQs & Troubleshooting