CTroubleshooting165Troubleshooting ChecklistThis chapter of the manual is designed to help you with problemsthat you may encounter with your personal computer. To efficientlytroubleshoot your system, treat each problem individually. This is toensure an accurate diagnosis of the problem in case a problem hasmultiple causes.Some of the most common things to check when you encounterproblems while using your system are listed below.1. The power switch of each peripheral device is turned on.2. All cables and power cords are tightly connected.3. The electrical outlet to which your peripheral devices are con-nected is working. Test the outlet by plugging in a lamp or otherelectrical device.4. The monitor is turned on.5. The display’s brightness and contrast controls are adjusted prop-erly.6. All add-in boards in the expansion slots are seated securely.7. Any add-in board you have installed is designed for your systemand is set up correctly.Monitor/DisplayIf the display screen remains dark after the system is turned on:1. Make sure that the monitor’s power switch is on.2. Check that one end of the monitor’s power cord is properlyattached to the monitor and the other end is plugged into aworking AC outlet. If necessary, try another outlet.3. Check that the video input cable is properly attached to themonitor and the system’s display adapter.4. Adjust the brightness of the display by turning the monitor’sbrightness control knob.Appendix C - Troubleshooting