User Guide

4.1 General 4 Replacement Procedures
4 1
4.1 General
This chapter explains how to disassemble the computer and replace Field Replaceable Units
(FRUs). Some replacement procedures may not require you to remove all the surrounding
FRUs to replace only one FRU. The chart below shows the FRUs in the order in which they
should be removed in a top-down manner, irrespective of their physical locations. The FRUs
shown in the top area of the chart should normally be removed before removing the FRUs
shown in the bottom area. To replace the FRUs, first identify the suspect FRU for the system
failure. Next, according to this chart, determine the FRUs that need to be removed before
removing the suspect FRU. After you determined those FRUs, go to the appropriate sections
according to the section numbers shown in the boxes. Then start removal and replacement.
How to use the chart (two examples):
• For removing the Cooling Module
First, remove the top cover with the
display assembly. Then, remove the
HDD, selectable bay module, switch
cover, keyboard, and wireless LAN
card, all of which are shown above the
top cover with the display assembly.
• For removing the LCD Module
First, remove the display mask and FL
inverter board, both of which are
shown above the LCD module.
Cooling
module
4.11 Top Cover with Display Assembly
4.17 System
Board
4.1
6
CP
U
4.10
Sound
Boar
d
4.13
Power
4.15
Cooling
Module
4.18
Membran
e
Switch
4.7
Speakers
and
Microphone
4.19
LCD/FL
Cable
4.2
0
FL
4.12
RTC
4.10 LCD
Module
4.9
FL Inverter
4.8
Display
4.6
Wireless
LAN Car
d
4.5
K
eyboar
d
4.4
Switch
Cover
4.3
Selectable
Bay
Modules
4.2
HDD
4.11 Top Cover
4.17 System Board 4.16
CPU
4.14
Sound
Board
4.13 Power
4.15
Cooling
Module
4.18
Membrane
Switch
4.7
Speakers and
Microphone
4.19
LCD/FL
Cable
4.20
FL
4.12 RTC
4.10
LCD Module
4.9 FL Inverter Board
4.8 Display Mask
4.6 Wireless LAN Card
4.5 Ke
y
board4.4
Switch Cover
4.3
Selectable Bay
Modules
4.2
HDD
Satellite M20 Maintenance Manual 4-1