Dell OptiPlex GX100 User Guide - Page 3

4. Reconnect the system to an electrical outlet. Make sure that all connections fit tightly together, and turn on the system. 5. If the problem is resolved, you have corrected a faulty connection. 6. If your monitor is not operating properly, see "Troubleshooting the Monitor." 7. If your keyboard is not operating properly, see "Troubleshooting the Keyboard." 8. If your mouse or printer is not operating properly, see "Troubleshooting I/O Ports." Otherwise, see "Look and Listen." Look and Listen Looking at and listening to your system is important in determining the source of a problem. Look and listen for the indications described in Table 1. If after looking and listening to your computer you have not resolved the problem, continue with the recommendations in "System Setup." Table 1. Boot Routine Indications Look/Listen for: Action An error message See "Messages and Codes." The monitor's power indicator Most monitors have a power indicator (usually on the front bezel). If the monitor's power indicator does not light up, see "Troubleshooting the Monitor." The power and hard-disk drive indicators Use the power and hard-disk drive indicators to help you identify a system problem when you press the power button to turn on the computer but the system does not boot. The power indicator Use the power indicator to help you identify a system problem when you press the power button to turn on the computer but the system does not boot: l A blinking yellow power indicator before power-on self-test (POST) indicates that the power supply may be faulty. In rare cases, the system board may be faulty. See "Getting Help" for instructions on getting technical assistance from Dell. l A solid yellow power indicator before POST indicates that a device on the system board may be faulty or is incorrectly installed. Be sure that the microprocessor is properly seated, remove all expansion cards, and then reboot. If the system does not boot, see "Getting Help" for instructions on getting technical assistance from Dell. l A solid green power indicator and a beep code during POST indicate that a dual in-line memory module (DIMM) may be faulty or is not properly seated. Remove all DIMMs, install only one DIMM, and then reboot. Repeat this procedure until you identify the faulty or improperly seated DIMM. l A solid green power indicator and no beep code and no video during POST indicate that the monitor or the integrated video controller may be faulty. See "Troubleshooting the Monitor. "If the monitor is operating properly and is correctly connected, see "Getting Help" for instructions on getting technical assistance from Dell. l A solid green power indicator and no beep code with video during POST indicate that an integrated system board device may be faulty. See "Getting Help" for instructions on getting technical assistance from Dell. The keyboard indicators The diskette-drive access indicator The hard-disk drive access indicator A series of beeps An unfamiliar constant scraping or grinding sound when you access a drive The absence of a familiar sound Most keyboards have one or more indicators (usually in the upper-right corner). Press the key, the key, and the key to toggle the keyboard indicators on and off. If the keyboard indicators do not light up, see "Troubleshooting the Keyboard." The diskette-drive access indicator should quickly flash on and off when you access data on the diskette drive. On a system running a Microsoft® Windows® operating system, you can test the drive by opening Windows Explorer and clicking the icon for drive A. If the diskette-drive access indicator does not light up, see "Troubleshooting Drives." The hard-disk drive access indicator should quickly flash on and off when you access data on the hard-disk drive. On a system running a Windows operating system, you can test the drive by opening Windows Explorer and clicking the icon for drive C. If the hard-disk drive access indicator does not light up, see "Troubleshooting Drives." See "Messages and Codes." Make sure the sound is not caused by the application program you are running. The sound could be caused by a hardware malfunction. See "Getting Help" for instructions on getting technical assistance from Dell. When you turn on your system, you can hear the hard-disk drive spin up, and the system tries to access the boot files from the hard-disk drive or the diskette drive. If your system boots, see "Dell Diagnostics." If your system does not boot, see "Getting Help."