MFC-B7800DN FAQs & Troubleshooting MFC-B7800DN Not your product? Sort by: Updated Date Popularity 3 Results 1. 08/06/2023 I cannot connect to the printer via Wi-Fi Direct using the Brother Print Service Plugin (Android™ 12 or later). 2. 19/12/2022 Can I use non-Brother or third party supplies with the Brother machine? 3. 12/10/2017 Where can I find my Brother machine's serial number? Specification FAQs & Troubleshooting