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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Acer 4820T manual FRU Field Replaceable Unit List