Dell Precision PD055 Quick Reference Manual

38 Quick Reference GuideError MessagesNOTE: If the message is not listed, see the documentation for either the operating system or the program that wasrunning when the message appeared.If an error occurs during start-up, a message may be displayed on the monitor identifying the problem.See "Error Messages" in your User’s Guide for suggestions on resolving any problems.Diagnostic LightsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in theProduct Information Guide.To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4" on thefront. The lights can be "off" or green. When the computer starts normally, the lights flash. If thecomputer malfunctions, the pattern 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 No electrical power issupplied to the computer.Connect the computer to an electrical outlet.Ensure that the front-panel power light is on.If the power light is off, ensure that thecomputer is connected to a working electricaloutlet and then press the power button.If the problem is still not resolved, contactDell for technical assistance.off The computer is in a normaloff condition; the computer isconnected to an electricaloutlet.Press the power button to turn the computer on.If the computer does not turn on, ensure thatthe front-panel power light is on. If the powerlight is off, ensure that the computer isconnected to a working electrical outlet andthen press the power button.If the problem is still not resolved, contactDell for technical assistance.