HL-5370DW/HL-5370DWT FAQs & Troubleshooting HL-5370DW/ HL-5370DWT Not your product? Sort by: Updated Date Popularity 1 Results 1. 08/26/2011 I heard a beep sound from the UPS (Uninterruptible Power Supply) when I turned on my Brother machine. Others FAQs & Troubleshooting