MFC-9840CDW FAQs & Troubleshooting MFC-9840CDW Not your product? Sort by: Updated Date Popularity 2 Results 1. 25/05/2018 What can happen if the wrong paper is used in your machine. 2. 19/09/2014 What is the recommended paper? More FAQs Consumables / Paper / Accessories FAQs & Troubleshooting