MFC-9970CDW FAQs & Troubleshooting MFC-9970CDW Not your product? Sort by: Updated Date Popularity 2 Results 1. 01/28/2013 The keys on the control panel do not respond. 2. 08/26/2011 I heard a beep sound from the UPS (Uninterruptible Power Supply) when I turned on my Brother machine. Others FAQs & Troubleshooting