26 Quick Reference GuideA possible graphics card failure has occurred. • If the computer has a graphics card,remove the card, reinstall it, and thenrestart the computer.• If the problem still exists, install agraphics card that you know works andrestart the computer.• If the problem persists or the computerhas integrated graphics, contact Dell.For information on contacting Dell, seeyour online User’s Guide.A possible floppy or hard drive failure hasoccurred.Reseat all power and data cables andrestart the computer.A possible USB failure has occurred. Reinstall all USB devices, check cableconnections, and then restart thecomputer.No memory modules are detected. • If you have one memory moduleinstalled, reinstall it and restart thecomputer. For information onreinstalling memory modules, see youronline User’s Guide.• If you have two or more memorymodules installed, remove the modules,reinstall one module, and then restartthe computer. If the computer startsnormally, reinstall an additional module.Continue until you have identified afaulty module or reinstalled all moduleswithout error.• If available, install properly workingmemory of the same type into yourcomputer.• If the problem persists, contact Dell. Forinformation on contacting Dell, see youronline User’s Guide.Light Pattern Problem Description Suggested Resolutionbook.book Page 26 Wednesday, March 14, 2007 11:21 AM