Troubleshooting Tools 43Troubleshooting ToolsDiagnostic LightsCAUTION: Before you begin any of the procedures in this section, follow the safety instructionslocated in the Product Information Guide.To help you troubleshoot a problem, your computer has four lights labeled "A," "B," "C," and "D" onthe front panel (see page 55). The lights can be yellow or green. When the computer startsnormally, all four lights flash solid green. After the computer starts and the user accesses theoperating system, all four lights go off. If the computer malfunctions, the color and sequence of thelights identify the problem.Light Pattern Problem Description Suggested ResolutionThe computer is starting normally. None.• The computer is in a normal on conditionand the operating system is running.• The computer is in a normal off condition.• None.• If the computer is off, plug it into a workingelectrical outlet and press the power button.A possible processor failure has occurred. Contact Dell (see page 118).C7565bk1.book Page 43 Wednesday, January 26, 2005 1:37 PM
