HP ProBook 4520s Notebook PC and HP ProBook 4720s Notebook PC - Maintenance and Service Guide

7. Remove the power button board cable (see Power button board on page 58).
8. Remove the speakers (see
Speakers on page 60).
9. Remove the thermal shield (see
Thermal shield on page 62).
10. Remove the display assembly (see
Display assembly on computers with 17.3-in displays
on page 80 or Display assembly on computers with 15.6-in displays on page 86).
11. Remove the palm rest (see
Palm rest on page 76).
12. Remove the hard drive (see
Hard drive on page 78).
13. Remove the top cover (see
Top cover on page 92).
Remove the modem module:
1. Position the computer right-side up with the front toward you.
2. Remove the two Phillips PM2.5×3.0 screws (1) that secure the modem module to the system
board.
3. Lift the modem module (2) straight up from the system board.
4. Disconnect the modem module cable (3). The modem module cable is spared in the Cable kit
spare part number 599807-001.
5. Remove the modem module.
Reverse this procedure to install the modem module.
100 Chapter 4 Removal and replacement procedures