HL-4000CN FAQs & Troubleshooting HL-4000CN Not your product? Sort by: Updated Date Popularity 4 Results 1. 09/19/2014 How do I install the Optional Tray Module? 2. 01/27/2014 How do I install additional memory? 3. 05/09/2013 What kind of consumables or options does this printer use? 4. 10/17/2006 What kind of memory can I use? Consumables / Paper / Accessories FAQs & Troubleshooting