MFC-8840DN FAQs & Troubleshooting MFC-8840DN Not your product? Sort by: Updated Date Popularity 5 Results 1. 11/01/2023 Can I use non-Brother or third party supplies with the Brother machine? 2. 16/08/2022 What is the difference between the toner cartridge and the drum unit? 3. 11/04/2019 Replace the drum unit 4. 24/09/2015 Can I buy any MICR toner? 5. 22/06/2012 Replace the toner cartridge. More FAQs Consumables / Paper / Accessories FAQs & Troubleshooting