Hardware UD3 M350C Disassembly Guide Current: Mainboard and Rear Outer Casing PDF Download PDF Download page Mainboard and Rear Outer Casing. Current page All pages Mainboard and Rear Outer Casing Push the retaining clips carefully aside to remove the memory.Plug out the tactile sensor (1), LED (2), speaker (3), and serial port (4) cables.Loosen the six screws and the two standoffs.Remove the rear outer casing.Remove the mainboard from the chassis.Detach the EMC gasket. ×