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

2-2

Removal and Replacement

HP OmniBook 4100/4150