HP ProBook 4430s, 4431s, 4330s and 4331s Notebook PCs - Maintenance and Service Guide

Reverse this procedure to install the keyboard.
Fan
Description Spare part number
Fan 646358-001
Before removing the fan, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet,
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 48).
5. Remove the bottom door (see
Bottom door on page 50).
Remove the fan:
1. Position the computer upside-down with the front toward you.
2. Disconnect the fan cable (1) from the system board.
3. Remove the Phillips PM2.0×3.5 screw (2) that secures the fan to the base enclosure.
Component replacement procedures 67