No. Component No. Component No. Component
7 Memory module
sockets
18 Front USB 29 Network/USB
8 Main power 19 Hard disk activity LED 30 Audio
9 Diskette drive 20 Internal USB 31 USB
10 Primary IDE 21 Speaker 32 Parallel
11 Chassis intrusion
switch
22 Front audio 33 Serial
34 Keyboard/Mouse
* Electrically x4 bandwidth
System board architecture
The following image shows the HP xw4400 Workstation block diagram.
Figure 4-3 System board block diagram
Steps for removal and replacement of components
This section discusses the procedures necessary to remove and install various hardware components
on your workstation. Review the safety and precautions and the
Service considerations on page 52, as
well as the Safety and Regulatory Information, before servicing or upgrading your system.
1. Read all safety information and precautions.
2. Locate and clear a suitable work area.
3. Shut down the system and remove power from the unit.
Table 4-3 System board components (continued)
58 Chapter 4 Removal and replacement procedures ENWW
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