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2-2 Removal and Replacement HP OmniBook 4100/4150
Notes
Reassembly steps are the reverse of the removal steps. Reassembly notes are included at the
end of each section below.
Symbols like this throughout this chapter show approximate full-size screw outlines. You
can use them to verify the sizes of screws before you install them. Installing a wrong-size screw
can damage the unit. (The symbol at the left represents an M2.5×5mm T-head screw.)
Table 2-2. Required Equipment
• Small Phillips screwdriver, preferably magnetized.
• 5 mm hex driver.
• Pointed knife or probe.
• Small flat-blade screwdriver.
• IC (PLCC) removal tool (similar to OK Industries EX-5).
• OmniBook 4150† CPU removal tool (HP part number T-335665).
Table 2-3. Recommended Screw Torques
Screw Thread Size Torque (kgf•cm) Torque (lbf•in)
M2 1.3 – 1.8 1.1 – 1.5
M2.5 (4–5 mm long) 3.0 – 3.5 2.6 – 3.0
M2.5 (16–19 mm long) 2.5 – 3.0 2.2 – 2.6
M3 3.0 – 3.5 2.6 – 3.0