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1-12 Product Information HP OmniBook 4100
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 (MMO) 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 1-13—it lists the roles the replaceable modules
play in each of the functional subsystems.
PCMCIA
Cards
CPU
Module
Audio Jack
PCA
DC-DC
PCA
Main
Battery
Keyboard
(pointing stick)
RAM
Board
LVDS
PCA
VGA PCA (LEDs)
LCD Module
Touch-pad Support
Assembly
Motherboard
PCA
BIOS
IC
Hard Disk
Drive
Fan
Speaker Speaker
Plug-In
Module
or Battery
IR
PCA
Inverter PCA
(microphone)
LED Strip
Figure 1-4. Replaceable Module Diagram
The power switch and lid
switch are contained on
the motherboard.
All external connections
(except IR and audio)
are made to the
motherboard.