HP ProBook 6455b, 6555b, 6450b and 6550b Notebook PCs Maintenance and Service Guide

Modem module
NOTE: The modem module spare part kit does not include a modem module cable. The modem
module cable is included in the Cable Kit, spare part numbers 613352-001.
Description Spare part number
For use in all countries and regions except Australia and New Zealand 628824-001
Before removing the modem module, 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 74).
5. Remove the following components:
a. Bluetooth module (see
Bluetooth module on page 76)
b. Mass storage device (see
Mass storage device on page 78)
c. Optical drive (see
Optical drive on page 88)
d. Keyboard (see
Keyboard on page 90)
e. Switch cover (see
Switch cover on page 97)
f. Palm rest (see
Palm rest on page 100)
g. Display assembly (see
Display assembly on page 108)
h. Top cover (see
Top cover on page 120)
Remove the modem module:
1. Remove the Phillips PM2.0×5.0 screw (1) that secures the modem module to the system board.
2. Lift the right side (2) of the modem module to disconnect it from the system board.
Component replacement procedures 127