
4 Troubleshooting Your System . . . . . . . . . . . . . . . . . . . . 111
| Safety  | 111 | 
| 111 | |
| Checking the Equipment | 112 | 
| Troubleshooting IRQ Assignment Conflicts | 112 | 
| Troubleshooting External Connections | 112 | 
| Troubleshooting the Video Subsystem | 113 | 
| Troubleshooting the Keyboard | 113 | 
| Troubleshooting the Mouse | 114 | 
| Troubleshooting Basic I/O Functions | 114 | 
| Troubleshooting a Serial I/O Device | 115 | 
| Troubleshooting a USB Device | 115 | 
| Troubleshooting a NIC | 116 | 
| Troubleshooting a Wet System | 116 | 
| Troubleshooting a Damaged System | 117 | 
| Troubleshooting the System Battery | 118 | 
| Troubleshooting Power Supplies | 118 | 
| Troubleshooting System Cooling Problems | 119 | 
| Troubleshooting a Fan | 119 | 
| Troubleshooting System Memory | 120 | 
| Troubleshooting a Diskette Drive | 121 | 
| Troubleshooting an Optical Drive | 123 | 
| Troubleshooting an External SCSI Tape Drive | 123 | 
| Troubleshooting a Hard Drive | 124 | 
| Troubleshooting a SAS or SAS RAID Controller Daughter Card | 126 | 
| Troubleshooting Expansion Cards | 127 | 
| Troubleshooting the Microprocessors | 128 | 
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