HL-4200CN FAQs & Troubleshooting HL-4200CN Not your product? Sort by: Updated Date Popularity 2 Results 1. 26/08/2011 I heard a beep sound from the UPS (Uninterruptible Power Supply) when I turned on my Brother machine. 2. 24/08/2006 The printer has power problems. What should I do? English Others FAQs & Troubleshooting