Acer Aspire 4820T Series User manual

Acer Aspire 4820T
Service Guide
PRINTED IN TAIWAN
Service guide files and updates are available
on the ACER/CSD web; for more information,
please refer to http://csd.acer.com.tw

II
Revision History
Please refer to the table below for the updates made on this service guides.
Date Chapter Updates

III
Copyright
Copyright © 2010 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in
any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without
the prior written permission of Acer Incorporated.
Disclaimer
The information in this guide is subject to change without notice.
Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular
purpose. Any Acer Incorporated software described in this manual is sold or licensed "as is". Should the
programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its
dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential
damages resulting from any defect in the software.
Acer is a registered trademark of Acer Corporation.
Intel is a registered trademark of Intel Corporation.
Other brand and product names are trademarks and/or registered trademarks of their respective holders.

IV
Conventions
The following conventions are used in this manual:
SCREEN MESSAGES Denotes actual messages that appear
on screen.
NOTE Gives bits and pieces of additional
information related to the current
topic.
WARNING Alerts you to any damage that might
result from doing or not doing specific
actions.
CAUTION Gives precautionary measures to
avoid possible hardware or software
problems.
IMPORTANT Reminds you to do specific actions
relevant to the accomplishment of
procedures.

V
Preface
Before using this information and the product it supports, please read the following general information.
1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION
decided for Acer's "global" product offering. To better fit local market requirements and enhance product
competitiveness, your regional office MAY have decided to extend the functionality of a machine (e.g.
add-on card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be covered
in this generic service guide. In such cases, please contact your regional offices or the responsible
personnel/channel to provide you with further technical details.
2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information
available on your regional web or channel. If, for whatever reason, a part number change is made, it will
not be noted in the printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIDERS, your Acer
office may have a DIFFERENT part number code to those given in the FRU list of this printed Service
Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and
service of customer machines.

VI

1
System Specifications 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Your Acer Notebook tour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Closed Front View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Left View 9
Right View 10
Bottom View 11
11
Indicators 11
TouchPad Basics 13
Using the Keyboard 14
Lock Keys and embedded numeric keypad 14
Windows Keys 15
Hot Keys 16
Hardware Specifications and Configurations 17
System Utilities 25
BIOS Setup Utility 25
Navigating the BIOS Utility 25
Aspire 4820T BIOS 26
Information 26
Main 27
Security 28
Boot 31
Exit 32
BIOS Flash Utilities 33
DOS Flash Utility 34
WinFlash Utility 36
Remove HDD/BIOS Password Utilities 37
Machine Disassembly and Replacement 43
Disassembly Requirements 43
General Information 44
Pre-disassembly Instructions 44
Disassembly Process 44
External Module Disassembly Process 45
External Modules Disassembly Flowchart 45
Removing the Battery Pack 46
Removing the SD dummy card 47
Removing the SIM card 48
Removing the Lower Cover 49
Removing the Optical Drive Module 50
Removing the DIMM Modules 52
Removing the WLAN Module 53
Removing the Hard Disk Drive Module 54
Main Unit Disassembly Process 55
Main Unit Disassembly Flowchart 55
Removing the Keyboard 56
Removing the Upper Cover 58
Removing the Power Switch Board 61
Removing the Function Board 62
Removing the Left Speaker Module 63

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Removing the USB Board 64
Removing the 3G Module 66
Removing the Bluetooth Module 67
Removing the LCD Module 68
Removing the Mainboard 70
Removing the Thermal Module 72
Removing the CPU 73
Removing the RTC Battery 74
Removing the WiFi Antenna Cable 74
Removing the Right Speaker 75
Removing the DC-In Cable 76
LCD Module Disassembly Process 77
LCD Module Disassembly Flowchart 77
Removing the LCD Bezel 78
Removing the Camera Module 79
Removing the LCD Panel 80
Removing the FPC Cable 81
Removing the Microphone Module 82
Removing the Hinges 82
Removing the Antennas 83
LCD Module Reassembly Procedure 85
Replacing the MIC and WiFi Antennas 85
Replacing the Microphone Module 86
Replacing the FPC Cable 87
Replacing the LCD Panel 87
Replacing the Webcam 88
Replacing the LCD Bezel 89
Main Module Reassembly Procedure 91
Replacing the DC-In Cable 91
Replacing the LCD Module 92
Replacing the Right Speaker 92
Replacing the RTC Battery 93
Replacing the CPU 94
Replacing the Thermal Module 94
Replacing the Mainboard 96
Replacing the Bluetooth Module 97
Replacing the 3G Module 98
Replacing the USB Board 99
Replacing the Left Speaker Module 100
Replacing the Function Board 101
Replacing the Switch Board 101
Replacing the Upper Cover 102
Replacing the Keyboard 105
Replacing the Hard Disk Drive Module 105
Replacing the WLAN Board 107
Replacing the DIMM Modules 107
Replacing the ODD Module 108
Replacing the Lower Covers 109
Replacing the Dummy Card 110
Replacing the SIM card 110
Replacing the Battery Pack 111
Troubleshooting 113
Common Problems 113
Power On Issue 114

3
No Display Issue 115
Random Loss of BIOS Settings 116
LCD Failure 117
Built-In Keyboard Failure 117
TouchPad Failure 118
Internal Speaker Failure 118
HDD Not Operating Correctly 120
ODD Failure 121
Wireless Function Failure 124
Thermal Unit Failure 124
External Mouse Failure 125
Other Failures 125
Intermittent Problems 126
Undetermined Problems 126
Post Codes 127
Jumper and Connector Locations 133
Top View 133
Bottom View 134
Clearing Password Check and BIOS Recovery 135
Clearing Password Check 135
BIOS Recovery by Crisis Disk 136
FRU (Field Replaceable Unit) List 137
Acer Aspire 4820T Exploded Diagrams 138
LCD Assembly 138
Acer Aspire 4820T FRU List 141
Screw List 149
Model Definition and Configuration 150
Acer Aspire 4820T Series 150
Test Compatible Components 213
Microsoft® Windows® 7 Environment Test 214
Online Support Information 215
Index 217

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