HL-1850 FAQs & Troubleshooting HL-1850 Not your product? Sort by: Updated Date Popularity 3 Results 1. 01/29/2014 How do I install the Optional Network Board?(Nc-4100h) 2. 01/27/2014 How do I install the Lower Tray Unit? (LT-500) 3. 01/27/2014 How do I install additional memory? (DIMM) Product Setup FAQs & Troubleshooting