Lexmark MS312dn Compact Laser Printer, Monochrome, Networking, Duplex Printing Up to 35 black pages per minute; print your first page as fast as 6.5 seconds Two-line All Points Addressable (APA)monochrome LCD display Network-ready; Duplex standard 128 MB of memory; 800 MHz dual-core processor, 10/100 Ethernet Kindly refer the user manual given below troubleshooting steps.