Table
Bootup | CPU module | Main processor (MMO). |
| Motherboard | Primary system circuitry, system BIOS. |
| Hard disk drive | First source of |
| Floppy drive | Second source of |
Processor | CPU module | Main processor, numeric data processor, L1 and L2 cache. |
| Motherboard | Primary system circuitry. |
Memory | Motherboard | Video RAM (XE4500). |
| SDRAM module | Changeable SDRAM (2 slots), video RAM (XE4100). |
Power | Battery | Power storage. |
| Motherboard | AC adapter socket, reset button, lid switch, power supply, power |
|
| control circuitry. |
| Switchboard PCA | Power button. |
| AC adapter | |
Display | Motherboard | Graphics controller, video RAM. |
| SDRAM module | Display output, backlight, power converter for backlight. |
| Display assembly |
|
Hard disk | Motherboard | Hard disk controller. |
| Hard disk drive | Hard disk mechanism. |
Floppy drive | Motherboard | I/O controller, floppy connector. |
| Floppy drive | Floppy drive mechanism. |
Keyboard | Motherboard | Keyboard BIOS, keyboard controller. |
| Switchboard PCA | Power switch, |
| Keyboard | Key switches. |
PS/2 | Motherboard | Keyboard circuitry, keyboard controller, keyboard BIOS. |
TouchPad | Top case | Touch pad sensor, click buttons, controller (PS/2 output). |
Audio | Motherboard | Audio controller, audio decoder, speaker amplifier, microphone, |
|
| external audio jacks, headphone amplifier, |
| Speaker assembly | Speakers. |
Status | Motherboard | LED circuitry, keyboard controller. |
| Switchboard PCA | Keyboard LEDs. |
| Top case | Main status LEDs. |
Serial | Motherboard | I/O controller, serial connector. |
Parallel | Motherboard | I/O controller, parallel connector. |
Infrared | Motherboard | I/O controller. |
| IR PCA | Infrared transmitter/receiver. |
PS/2 port | Motherboard | PS/2 connector, keyboard controller. |
USB | Motherboard | Bus controller (South Bridge), USB connector. |
Motherboard | I/O controller, | |
Port Replicator | Motherboard | Port replicator logic, port replicator connector (certain models). |
PCMCIA | Motherboard | PCMCIA controller. |
| PCMCIA socket | PCMCIA connectors. |
Wireless LAN | I/O controller, radio, radio frequency circuitry. | |
(certain models) | Antenna PCAs | Transmit/receive antennas. |
| IR PCA | On/off switch, indicator light. |
LAN | Motherboard | LAN circuitry, bus controller, LAN connector. |
Modem | Motherboard | Modem circuitry (certain models), modem connector. |
Service Manual | Product Information |