Dell Dimension 3100C Service Manual - Page 7
Diagnostic Lights - memory type
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Solid green power light and no beep An integrated system board device may be faulty. code but the computer locks up during POST Owner's Manual. Check the diagnostic lights to see if the specific problem is identified. If the problem is not identified, contact Dell for technical assistance. Diagnostic Lights CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide. Your computer has four lights labeled "1," "2," "3," and "4" on the front panel to help you troubleshoot problems. When the computer starts normally, the lights flash. After the computer starts successfully, all four lights turn off. If the computer malfunctions, the color and sequence of the lights identify the problem. Light Pattern Problem Description The computer is in a normal "off" condition or a possible pre-BIOS failure has occurred. Suggested Resolution Plug the computer into a working electrical outlet. Also see "Power Problems" in your Owner's Manual. The diagnostic lights turn off after the system successfully boots to the operating system. NOTE: If all of the diagnostic lights are off and the system does not start, there may be a problem with the power supply or with the processor. A processor failure was detected. Contact Dell for technical assistance. Memory modules are detected, but a memory failure has occurred. l If you have two or more memory modules installed, remove the modules, reinstall one module (see "Memory"), and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error. l If available, install properly working memory of the same type into your computer (see "Memory"). l If the problem persists, contact Dell for technical assistance. A possible graphics failure has occurred. If the problem persists, contact Dell for technical assistance. A possible floppy drive or hard drive failure has occurred. Reseat all power and data cables and restart the computer. A possible USB failure has occurred. No memory modules are detected. Memory modules are detected, but a memory configuration or compatibility error exists. A possible expansion card failure has occurred. Another failure has occurred. Reinstall all USB devices, check cable connections, and then restart the computer. l If you have two or more memory modules installed, remove the modules, reinstall one module (see "Memory"), and then restart the computer. If the computer starts normally, reinstall an additional module. Continue until you have identified a faulty module or reinstalled all modules without error. l If available, install properly working memory of the same type into your computer (see "Memory"). l If the problem persists, contact Dell for technical assistance. l Ensure that no special memory module/memory connector placement requirements exist (see "DDR2 Memory Overview"). l Verify that the memory modules that you are installing are compatible with your computer (see "DDR2 Memory Overview"). l If the problem persists, contact Dell for technical assistance. 1. Determine whether a conflict exists by removing a card and restarting the computer (see "Cards"). 2. If the problem persists, reinstall the card that you removed, remove a different card, and then restart the computer. 3. Repeat this process for each card. If the computer starts normally, troubleshoot the last card removed from the computer for resource conflicts (see "Resolving Software and Hardware Compatibilities" in your computer Owner's Manual). 4. If the problem persists, contact Dell for technical assistance. l Ensure that the cables are properly connected to the system board from the hard drive, CD drive, and DVD drive (see "System Board Components"). l If there is an error message on your screen identifying a problem with a device (such as the floppy drive or hard drive), check the device to ensure that it is functioning properly. l The operating system is attempting to boot from a device (such as the
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