Table 1-8. Functional Structure Description HP Omnibook XE4400 Product Information 1-13 Bootup CPU module Motherboard Hard disk drive Floppy drive Main processor (MMO). Primary system circuitry, system BIOS. First source of disk-based startup code. Second source of disk-based startup code. Processor CPU module Motherboard Main processor, numeric data processor, L1 and L2 cache. Primary system circuitry. Memory Motherboard SDRAM module Video RAM no onboard SDRAM Power Battery Motherboard AC adapter Power storage. AC adapter socket, reset button, lid switch, power supply, power control circuitry. AC-to-DC converter.
Display Motherboard Display assembly Graphics controller, video RAM Display output, backlight, power converter for backlight. Hard disk Motherboard Hard disk drive Hard disk controller. Hard disk mechanism. Floppy drive Motherboard Floppy drive I/O controller, floppy connector. Floppy drive mechanism. Keyboard Motherboard Button cover Keyboard Keyboard BIOS, keyboard controller. Power switch, one-touch buttons Key switches. PS/2 Touchpad Motherboard Top case Keyboard circuitry, keyboard controller, keyboard BIOS. Touch pad sensor, click buttons, controller (PS/2 output).
Audio Motherboard Audio Control PCA Keyboard cover/speaker assembly Audio controller, audio decoder, speaker amplifier, microphone. External audio jacks, headphone amplifier, audio-off switch. Speakers. Status Motherboard Button cover Top case LED circuitry, keyboard controller. Keyboard LEDs. Main status LEDs. Serial Motherboard I/O controller, serial connector. Parallel Motherboard I/O controller, parallel connector. Infrared Motherboard I/O controller, infrared transmitter/receiver. PS/2 port Motherboard PS/2 connector, keyboard controller. USB Motherboard Bus controller (South Bridge), USB connector. S-Video Motherboard I/O controller, S-video connector (certain models).
Port Replicator Motherboard Port replicator logic, port replicator connector (certain models). PCMCIA Motherboard PCMCIA socket PCMCIA controller. PCMCIA connectors. Wireless LAN (certain models) Mini-PCI Antenna PCAs I/O controller, radio, radio frequency circuitry. Transmit/receive antennas. LAN Motherboard LAN circuitry, bus controller, LAN connector. Modem Motherboard Modem circuitry (certain models), modem connector.