Internal Design; Figure 1-4. Replaceable Module Diagram - HP OmniBook 900 Service Manual

Internal Design

The motherboard PCA is the central component of the OmniBook design. It plays a role in virtually
all system functions. The CPU module and most other subsystems connect to the motherboard.
The following figure shows the connections among the replaceable electrical modules. As a substitute
for a functional block diagram, see the table on page 1-14—it lists the roles that the replaceable
modules play in each of the functional subsystems.
CPU
Module
RAM
Board
Fan
Hard Disk
Drive
HP OmniBook 900
Top Case
Touch
(microphone)
Pad
BIOS
IC
Motherboard
PCA
Keyboard
(pointing stick)

Figure 1-4. Replaceable Module Diagram

LCD Module
PCMCIA
Socket
Battery
Product Information
External
Module Bay
PCMCIA
Cards
Speaker
The power switch and lid
switch are contained on
the motherboard.
All external connections
are made to the
motherboard.
1-13