FAQs & Troubleshooting FAQ Search Results MFC-L3770CDW Not your product? Search by FAQ ID number Search Back to FAQs & Troubleshooting. 2 Results 1.faq00100468_012 (Video) Update the Driver or Firmware for your Brother machine 2.faq00100468_001 Update the Driver or Firmware for your Brother machine FAQs & Troubleshooting