28 Chapter 3System Screw ListListed below are the screw types used in this system, plus their corresponding part numbers.NOTE: The screws for the different components vary in size. During the disassembly process, group thescrews with their corresponding components to avoid mismatches when putting back the components.Pre-disassembly ProcedureBefore proceeding with the disassembly procedure, perform the steps listed below:1. Turn off the power to the computer and all peripherals.2. Unplug the power cord from the computer.3. Unplug all peripheral cables from the computer.4. Close the notebook lid and place the computer on a flat, steady surface.Screw Type Color Part NumberA M2 x L8 BZN+NYLOK Black 86.00D75.220B M2 x L4 BZN Black 86.00A02.140C M2.5 x L8 BZN+NYLOK Black 86.00E34.738D M2 x L4 BZN+NYLOK Black 86.00E13.524E M3 x L4 Silver 86.9A554.4R0F M2 x L3 BZN+NYLOK Black 86.00E25.723G M2 x L2.5 BZN+NYLOK Black 86.00D72.620H M2.5 x L12 BZN+NYLOK Silver 86.00E67.63CI M2.5 x L4 BZN+NYLOK Black 86.00D30.630J M2.5 x L6 BZN+NYLOK Black 86.00E33.736K M2 X L2 NI Silver 86.00D77.320L M2.5 x L5 BZN+NYLOK Black 86.00F19.735M M2.5 x L3 BZN+NYLOK Black 86.00D52.630