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Acer Aspire 5820T Service Guide - Page 148

Replacing the RTC Battery, Place the RTC battery onto the mainboard and press down firmly.

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Replacing the RTC Battery 1. Place the RTC battery onto the mainboard and press down firmly. 2. Connect the RTC battery cable to the mainboard. 138 Chapter 3

Section	Page
System Specifications	11
Features	11
System Block Diagram	15
Notebook Tour	16
Top View	16
Closed Front View	17
Left View	17
Right View	18
Base View	19
Indicators	19
TouchPad Basics	20
Using the Keyboard	21
Lock Keys and embedded numeric keypad	21
Windows Keys	22
Hot Keys	23
Special Keys	24
Hardware Specifications and Configurations	25
System Utilities	33
BIOS Setup Utility	33
Navigating the BIOS Utility	33
Information	34
Main	35
Security	36
Boot	39
Exit	40
BIOS Flash Utility	41
DOS Flash Utility	42
WinFlash Utility	43
Remove HDD/BIOS Password Utilities	44
Removing BIOS Passwords:	45
Miscellaneous Utilities	46
Machine Disassembly and Replacement	49
Disassembly Requirements	49
Related Information	49
Replacement Requirements	49
Pre-disassembly Instructions	50
Disassembly Process	51
External Module Disassembly Process	52
External Modules Disassembly Flowchart	52
Removing the Battery Pack	53
Removing the Dummy Card	54
Removing the SIM Card	55
Removing the Base Door	56
Removing the Hard Disk Drive Module	58
Removing the DIMM Module	60
Removing the WLAN Module	61
Removing the 3G Module	63
Removing the ODD Module	65
Removing the RTC Battery	67
Main Unit Disassembly Process	68
Main Unit Disassembly Flowchart	69
Removing the Keyboard	71
Removing the Upper Cover	73
Removing the Switch Board	77
Removing the Power Board	79
Removing the LCD Module	81
Removing the I/O Board	86
Removing the Bluetooth Module	88
Removing the Mainboard	90
Removing the Thermal Module	92
Removing the CPU	93
Removing the PCH Thermal Unit	94
Removing the Power Cable Assembly	95
LCD Module Disassembly Process	97
LCD Module Disassembly Flowchart	97
Removing the LCD Bezel	99
Removing the Camera Board	101
Removing the LCD Panel	102
Removing the Antennas	105
Removing the Microphone Cable	108
LCD Reassembly Procedure	109
Replacing the Microphone	109
Replacing the Antennas	109
Replacing the LCD FPC Cable	113
Replacing the LCD Panel	114
Replacing the Camera Board	116
Replacing the LCD Bezel	117
Main Unit Reassembly Process	120
Replacing the Power Assembly	120
Replacing the PCH Thermal Module	122
Replacing the CPU	122
Replacing the Thermal Module	124
Replacing the Main Board	125
Replacing the I/O Card	126
Replacing the Bluetooth Module	128
Replacing the LCD Module	130
Replacing the Power Board	134
Replacing the Switch Board	135
Replacing the Upper Cover	136
Replacing the Keyboard	140
Replacing the Wireless LAN Module	141
Replacing the 3G Module.	143
Replacing the DIMM Module	145
Replacing the Hard Disk Drive	146
Replacing the RTC Battery	148
Replacing the ODD Module	149
Replacing the Base Door	151
Replacing the SIM Card	152
Replacing the Battery	152
Replace the Dummy Card	153
Troubleshooting	155
Common Problems	155
Power On Issue	156
No Display Issue	157
Random Loss of BIOS Settings	158
LCD Failure	159
Built-In Keyboard Failure	160
TouchPad Failure	161
Internal Speaker Failure	162
Internal Microphone Failure	163
HDD Not Operating Correctly	164
USB Failure (Right up/down side)	165
Other Failures	165
Intermittent Problems	166
Undetermined Problems	166
Post Code Reference Tables	167
Jumper and Connector Locations	173
Mainboard Top View	173
Mainboard Bottom View	174
BIOS Recovery	175
BIOS Recovery by Crisis Disk	175
FRU (Field Replaceable Unit) List	177
Exploded Diagrams	178
Main Assembly	178
LCD Assembly	180
FRU List	181
Screw Table	189
Model Definition and Configuration	191
Test Compatible Components	261

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