Troubleshooting system startup failure...........................................................................................................................126
Troubleshooting external connections............................................................................................................................ 126
Troubleshooting the video subsystem............................................................................................................................ 126
Troubleshooting a USB device......................................................................................................................................... 127
Troubleshooting a serial I/O device................................................................................................................................. 127
Troubleshooting a NIC.......................................................................................................................................................128
Troubleshooting a wet system......................................................................................................................................... 128
Troubleshooting a damaged system................................................................................................................................129
Troubleshooting the system battery............................................................................................................................... 130
Troubleshooting power supply units.................................................................................................................................131
Troubleshooting cooling problems................................................................................................................................... 132
Troubleshooting cooling fans............................................................................................................................................132
Troubleshooting system memory.....................................................................................................................................133
Troubleshooting a hard drive............................................................................................................................................134
Troubleshooting a storage controller...............................................................................................................................134
Troubleshooting expansion cards.................................................................................................................................... 135
Troubleshooting processors............................................................................................................................................. 136
6
Contents