The Dell motherboard for Latitude 5420 laptops, identified by the manufacturer part number 47J2X, serves as the central component for this business-class computer system. This original Dell replacement board ensures compatibility with the Latitude 5420 chassis and internal components, facilitating proper integration with the cooling system, power supply, and peripheral connections. The motherboard supports 11th generation Intel Core processors through its LGA-1200 socket configuration and accommodates up to 64 GB of DDR4 memory across two SODIMM slots at 3200 MHz. The memory connections include an M.2-2280 slot for NVMe SSDs and a 2.5-inch SATA bay for traditional hard drives or SSDs. Integrated Intel Wi-Fi 6 AX201 and Bluetooth 5.1 provide wireless connectivity, while wired networking is managed by an Intel I219-LM Gigabit Ethernet controller. Display outputs include an HDMI 2.0 port supporting 4K resolution at 60 Hz and a USB-C port with DisplayPort Alternate Mode. The board features multiple USB ports, including USB 3.2 Gen 1 Type-A and Type-C configurations, as well as a 3.5mm audio combo jack. Power management is handled via the standard Dell barrel connector, and the motherboard includes necessary headers for the system webcam, microphone array, and optional smart card reader. This component is intended for technical professionals performing repairs or upgrades on Dell Latitude 5420 systems where the original motherboard needs to be replaced.