Dell Precision 490 Desktop Quick Reference Guide - Page 38

Error Messages NOTE: If the message is not listed, see the documentation for either the operating system or the program that was running 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 Lights CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product 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 the computer starts normally, the lights flash. If the computer malfunctions, the pattern of the lights and also that of the power button help to identify the problem.These lights also indicate sleep states. Diagnostic Light Codes Before POST Diagnostic Lights Power Light off off Problem Description Suggested Resolution No electrical power is supplied 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 the computer is connected to a working electrical outlet and then press the power button. If the problem is still not resolved, contact Dell for technical assistance. The computer is in a normal Press the power button to turn the computer on. off condition; the computer is If the computer does not turn on, ensure that connected to an electrical the front-panel power light is on. If the power outlet. light is off, ensure that the computer is connected to a working electrical outlet and then press the power button. If the problem is still not resolved, contact Dell for technical assistance. 38 Quick Reference Guide