MFC-9970CDW FAQs & Troubleshooting MFC-9970CDW Not your product? Sort by: Updated Date Popularity 4 Results 1. 12/17/2014 Nothing shows up on the machine's display after installing additional memory. 2. 02/22/2013 Install the optional lower tray 3. 11/05/2010 What kind of memory can I use? 4. 10/15/2010 Install extra memory Consumables / Paper / Accessories FAQs & Troubleshooting