Troubleshooting Tools 12110Troubleshooting ToolsDiagnostic LightsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in theProduct Information Guide.To help you troubleshoot a problem, your computer has four lights labeled "1,""2," "3," and "4" on the front. The lights can be "off" or green. When thecomputer starts normally, the lights flash. If the computer malfunctions, thepattern of the lights and also that of the power button help to identify theproblem. These lights also indicate sleep states.Diagnostic Light Codes Before POSTDiagnostic Lights PowerLightProblem Description Suggested Resolutionoff The computer is in anormal off conditionor in WindowsHibernation mode.Press the power button toturn the computer on.If the computer does notturn on, ensure that thefront-panel power light ison. If the power light is off,ensure that the computer isconnected to a workingelectrical outlet and thenpress the power button.If the problem is still notresolved, contact Dell fortechnical assistance (see"Contacting Dell" onpage 295).
