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Contents 7
System Board . . . . . . . . . . . . . . . . . . . . . . 107
Removing the System Board
. . . . . . . . . . . . 107
Installing the System Board . . . . . . . . . . . . 109
4 Troubleshooting Your System . . . . . . . . 111
Safety First—For You and Your System . . . . . . . . . 111
Troubleshooting System Startup Failure
. . . . . . . . 111
Troubleshooting External Connections
. . . . . . . . . 111
Troubleshooting the Video Subsystem . . . . . . . . . 112
Troubleshooting a USB Device
. . . . . . . . . . . . . 112
Troubleshooting a Serial I/O Device
. . . . . . . . . . 113
Troubleshooting a NIC . . . . . . . . . . . . . . . . . . 113
Troubleshooting a Wet System
. . . . . . . . . . . . . 114
Troubleshooting a Damaged System
. . . . . . . . . . 115
Troubleshooting the System Battery
. . . . . . . . . . . 116
Troubleshooting Power Supply . . . . . . . . . . . . . 117
Troubleshooting System Cooling Problems
. . . . . . . 117
Troubleshooting Cooling Fan
. . . . . . . . . . . . . . 118
Troubleshooting System Memory . . . . . . . . . . . . 119
Troubleshooting an Internal USB Key
. . . . . . . . . . 120
Troubleshooting an Optical Drive
. . . . . . . . . . . . 121
Troubleshooting a Tape Backup Unit
. . . . . . . . . . 122
Coaster_HOM.book Page 7 Monday, November 3, 2014 3:23 PM