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4.1 General 4 Replacement Procedures
NB250/NB255 Maintenance Manual 4-1
4.1 General
This chapter explains how to disassemble the laptop 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 determine those FRUs, go to the appropriate sections according to the section
numbers shown in the boxes. Then start removal and replacement.
4.2 Battery 4.3 HDD 4.4 Memory
4.5 WLAN Card
4.6 Hinge Cover
and Keyboard
4.7 Power Board
4.8 Logic Upper
Assembly
4.13 Thermal
Fan Module
4.15 LCD Bezel
Assembly
4.16 LCD Module
4.17 Camera
module and LVDS
cable
4.9 Speaker
4.10 Touch Pad
4.11 Bluetooth
Card
4.14 WiMax
Module (Optional)
4.12 Motherboard
How to use the chart (two
examples):
For removing the
Motherboard:
First, remove parts from 4.6
Hinge Cover & Keyboard, 4.7
Power Board and 4.8 Logic
Upper Assembly
For removing the LCD
Module:
First, remove Logic Upper
Assembly, then remove the
LCD Bezel Assembly.
4.2 Battery 4.3 HDD 4.4 Memory
4.5 WLAN Card
4.6 Hinge Cover
and Keyboard
4.7 Power Board
4.8 Logic Upper
Assembly
4.13 Thermal
Fan Module
4.16 LCD Bezel
Assembly
4.17 LCD Module
4.18 Camera
module and
Micro
p
hone
4.9 Speaker
4.10 Touch Pad
4.14 3G Module
(Optional)
4.11 Bluetooth
Card
4.15 WiMax
Module (Optional)
4.12 Motherboard