System boardRemoving the system board1 Follow the procedure in Before working inside your computer.2 Remove the:a Back coverb Front bezel3 Open the front panel door.4 Remove the:a Heat sink assemblyb Processorc Expansion cardd Optional M.2 PCIe SSD carde SD card readerf Memory module5 Disconnect the optical drive and hard drive cables [1,2] from the connectors on the system board.6 Disconnect the following cables from the system board:a PSU [1]42 Disassembly and reassembly