9.Position the computer upright.
10.For 4540s models, remove the two 2 Torx T8M2.5×6.0 screws screws that secure the top cover to the computer.
11.For 4440s/4441s models, remove the three 2 Torx T8M2.5×6.0 screws screws that secure the top cover to the computer.
Component replacement procedures 73
