Dell OptiPlex N7132 Quick Reference Manual

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Contents

Quick Reference Guide 23Diagnostic 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 small form factor, small desktop, and small mini-towercomputers have four lights labeled "A," "B," "C," and "D" on the back panel. The lights can beyellow or green. When the computer starts normally, the patterns or codes on the lights change asthe boot process completes. If the POST portion of system boot completes successfully, all fourlights display solid green. If the computer malfunctions during the POST process, the patterndisplayed on the LEDs may help identify where in the process the computer halted.NOTE: The orientation of the diagnostic lights may vary depending on the system type. The diagnosticlights can appear in either a vertical or horizontal orientation.Y = YellowG = GreenLight Pattern Problem Description Suggested ResolutionThe computer is in a normal "off"condition or a possible pre-BIOS failurehas occurred.Plug the computer into a workingelectrical outlet and press the powerbutton.A possible BIOS failure has occurred; thecomputer is in the recovery mode.Run the BIOS Recovery utility, wait forrecovery completion, and then restart thecomputer.A possible processor failure has occurred. Reinstall the processor and restart thecomputer. For information on reinstallingthe processor, see your online User’sGuide.off off off offY Y Y GY Y G Y