8 | ContentsRemoving the Sensor Board for 3.5” Hard Drive System .................. 143Installing the Sensor Board for 3.5” Hard Drive System .................... 145Removing the Sensor Board for 2.5” Hard Drive System .................. 146Installing the Sensor Board for 2.5” Hard Drive System .................... 1484 Troubleshooting Your System .................................................149Safety First – For You and Your System ........................................................ 149Installation Problems ........................................................................................ 149Troubleshooting System Startup Failure....................................................... 150Troubleshooting External Connections ......................................................... 150Troubleshooting the Video Subsystem .......................................................... 150Troubleshooting a USB Device ....................................................................... 150Troubleshooting a Serial I/O Device.............................................................. 151Troubleshooting a NIC ...................................................................................... 152Troubleshooting a Wet System ....................................................................... 153Troubleshooting a Damaged System ............................................................. 154Troubleshooting the System Battery.............................................................. 154Troubleshooting Power Supplies ................................................................... 155Troubleshooting System Cooling Problems ................................................. 156Troubleshooting a Fan ...................................................................................... 156Troubleshooting System Memory................................................................... 157Troubleshooting a Hard Drive ......................................................................... 159Troubleshooting a Storage Controller ........................................................... 160Troubleshooting Expansion Cards ................................................................. 161Troubleshooting Processors ........................................................................... 162IRQ Assignment Conflicts................................................................................. 163
