To: J. D. Main who wrote (173817 ) 1/20/2004 8:36:05 AM From: kaka Respond to of 176387 J.D. Why seek out tech support for answers which can be found in your owners manual?? (ths actual light patterns didn't show up in my copy and paste) docs.us.dell.com Advanced Troubleshooting Dell™ Dimension™ 8300 Series Service Manual Diagnostic Lights Beep Codes System Messages -------------------------------------------------------------------------------- Diagnostic Lights To help you troubleshoot a problem, your computer is equipped with four lights on the back panel labeled "A," "B," "C," and "D." These lights can be yellow or green. When the computer starts normally, the lights flash. After the computer starts, all four lights will display solid green. If the computer malfunctions, the color and sequence of the lights identify the problem. CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in your Owner's Manual. Light Pattern Problem Description Suggested Resolution The computer is in a normal off condition or a possible pre-BIOS failure has occurred. Verify that the computer is plugged into a working electrical outlet and that you have pressed the power button. Memory modules are detected, but a memory failure has occurred. If you have one memory module installed, reinstall the module and restart the computer. If you have two or more memory modules installed, remove the modules, reinstall one module, 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. If available, install properly working memory of the same type into your computer. If the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for technical assistance. A possible expansion card failure has occurred. Determine if a conflict exists by removing a card (not the video card) and then restarting the computer. If the problem persists, reinstall the card that you removed, remove a different card, and then restart the computer. 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 Incompatibilities" in your Owner's Manual). If the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for technical assistance. A possible video card failure has occurred. If the computer has a video card, remove the card and reinstall it, and restart the computer. If the problem still exists, install a video card that you know works and restart the computer. If the problem persists or the computer has integrated video, contact Dell. See "Contacting Dell" in your Owner's Manual for technical assistance. A possible floppy or hard drive failure has occurred. Reseat all power and data cables and restart the computer. A possible USB failure has occurred. Reinstall all USB devices, check cable connections, and then restart the computer. No memory modules are detected. Reinstall all memory modules and restart the computer. To eliminate the possibility of a faulty memory connector, remove all memory modules, reinstall one memory module (if the computer supports a single module), and then restart the computer. If the computer starts normally, move the memory module to a different connector and restart the computer. Continue until you have identified a faulty connector or reinstalled all modules without error. Memory modules are detected, but a memory configuration or compatibility error exists. Ensure that there are no special memory module/memory connector placement requirements. Verify that the memory modules that you are installing are compatible with your computer. If the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for technical assistance. Other failure has occurred. Ensure that the cables are properly connected from the hard drive, CD drive, and DVD drive to the system board. If the problem persists, contact Dell. See "Contacting Dell" in your Owner's Manual for technical assistance. The computer is in a normal operating condition after POST. None.