FAX-2840 FAQs & Troubleshooting FAX-2840 Not your product? Sort by: Updated Date Popularity 3 Results 1. 28.01.2013 The keys on the control panel do not respond. 2. 29.06.2012 My Brother machine has no power. 3. 26.08.2011 I heard a beep sound from the UPS (Uninterruptible Power Supply) when I turned on my Brother machine. Others FAQs & Troubleshooting