134 Troubleshooting Your SystemChecking the EquipmentThis section provides troubleshooting procedures for external devicesattached to the system, such as the monitor, keyboard, or mouse. Before youperform any of the procedures, see "Troubleshooting External Connections"on page 134.Troubleshooting External ConnectionsLoose or improperly connected cables are the most likely source of problemsfor the system, monitor, and other peripherals (such as a printer, keyboard,mouse, or other external device). Ensure that all external cables are securelyattached to the external connectors on your system. See "Front-PanelFeatures and Indicators" on page 13 and "Back-Panel Features and Indicators"on page 16 for the front- and back-panel connectors on your system.Troubleshooting the Video SubsystemProblem• Monitor is not working properly.• Video memory is faulty.The USB diskette drive activityindicator.See "Troubleshooting a Diskette Drive" onpage 149.The USB CD drive activity indicator. See "Troubleshooting an Optical Drive" onpage 151.The hard-drive activity indicator. See "Troubleshooting a Hard Drive" onpage 153.An unfamiliar constant scraping orgrinding sound when you access adrive.See "Getting Help" on page 175.Table 4-1. Start-Up Routine Indications (continued)Look/listen for: Action
