System Board - HP ProSignia 120 Maintenance And Service Manual

5.9.5 System Board

To remove the system board, complete the following procedures:
Prepare the computer for disassembly (Section 5.3).
1.
Remove the hard drive (Section 5.6).
2.
On modem equipped models, remove the modem (Section 5.5).
3.
On IR equipped models, remove the IR module(Section 5.5.1).
4.
Remove the keyboard (Section 5.7.1).
5.
Remove the lithium real-time clock battery (Section 5.7.3).
6.
Remove the top cover assembly (Section 5.9).
7.
Remove the DC-DC Converter (Section 5.9.2).
8.
Remove the audio board (Section 5.9.3).
9.
10. Remove the fan (Section 5.9.4).
11. Disconnect the system board power input cable from the AC adapter.
Figure 5-33. Disconnecting the Power Input Connector from the System Board
Removal and Replacement Procedures 5-35