4 Replacement Procedures 
Chapter 4  Contents 
4.1 Overview....................................................................................................................4-1 
Safety Precautions ................................................................................................ 4-2 
Before You Begin ................................................................................................ 4-3 
Disassembly Procedure........................................................................................ 4-4 
Assembly Procedure ............................................................................................ 4-5 
Tools and Equipment ........................................................................................... 4-5 
Screw Tightening Torque .................................................................................... 4-6 
Grip Color ............................................................................................................ 4-6 
Screw Notation..................................................................................................... 4-7 
4.2 Battery pack ............................................................................................................... 4-8 
4.3  ExpressCard & PC card / Bridge media .................................................................. 4-10 
4.3.1  ExpressCard & PC card ........................................................................ 4-10 
4.3.2 Bridge media ......................................................................................... 4-12 
4.4 HDD......................................................................................................................... 4-13 
4.5 MDC ........................................................................................................................ 4-17 
4.6 Memory module....................................................................................................... 4-19 
4.7 Keyboard.................................................................................................................. 4-21 
4.8  Bottom cover assembly............................................................................................ 4-24 
4.9 LAN jack.................................................................................................................. 4-29 
4.10  Speaker (L) & Modem jack ..................................................................................... 4-30 
4.11 AV-IN board ............................................................................................................ 4-32 
4.12 Battery latch assembly ............................................................................................. 4-33 
4.13 Optical disk drive..................................................................................................... 4-35 
4.13.1  Replacing the optical disk drive............................................................ 4-35 
4.13.2  Ejecting the optical disk ........................................................................ 4-37 
4.14  SJ board / Internal Microphone................................................................................ 4-39 
4.14.1 SJ board ................................................................................................. 4-39 
4.14.2 Internal Microphone.............................................................................. 4-41 
4.15 Sound board ............................................................................................................. 4-42 
4.16 Power SW board ...................................................................................................... 4-44 
QOSMIO G20 Maintenance Manual (960-511)                [CONFIDENTIAL]  4-iii