Dell Precision Workstation 470 User Manual

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Contents

Tools to Help Solve Problems: Dell Precision Workstation 470 and 670 Computers User's Guidefile:///T|/htdocs/systems/ws670/EN/ug_en/advtrbl.htm[3/20/2013 9:31:57 AM]Solid green and a beepcode during POSTN/A A problem was detected while theBIOS was executing.See "Beep Codes" for instructions on diagnosingthe beep code. Also, check the diagnostic lightsto see if the specific problem is identified.Solid green power light andno beep code and no videoduring POSTN/A The monitor or the graphics cardmay be faulty or incorrectly installed.Check the diagnostic lights to see if the specificproblem is identified. See "Video and MonitorProblems."Solid green power light andno beep code but thecomputer locks up duringPOSTN/A An integrated system board devicemay be faulty.Check the diagnostic lights to see if the specificproblem is identified. If the problem is notidentified, contact Dell for technical assistance.Diagnostic LightsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions located inthe Product Information Guide.To help you troubleshoot a problem, your computer has four lights labeled "A," "B," "C," and "D" on the front panel. The lightscan be yellow, green, or off. When the computer starts normally, the lights flash. After the computer starts, all four lightsdisplay solid green. If the computer malfunctions, the color and sequence of the lights identify the problem.Diagnostic Light Codes Before POSTLight Pattern Problem Description Suggested ResolutionoffoffoffoffNo 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 electrical outlet and then pressthe power button.If the problem is still not resolved, contact Dell for technicalassistance.yellowoffoffoffThe computer is in anormal off condition; thecomputer is connected toan electrical outlet.Press the power button to turn the computer on.If the computer does not turn on, ensure that the front-panelpower light is on. If the power light is off, ensure that the computeris connected to a working electrical outlet and then press the powerbutton.If the problem is still not resolved, contact Dell for technicalassistance.yellowyellowoffoffThe computer is in areduced power or "sleep"state.Use one of the appropriate methods to "wake up" the computer.See "Advanced Features."If the problem is not resolved and you are trying to wake thecomputer with a USB mouse or keyboard, substitute the mouse orkeyboard with a working PS/2 mouse or keyboard and then try towake the computer.yellowyellowyellowoffThe BIOS is not executing. Ensure that the processor is seated correctly and restart thecomputer.If the problem is still not resolved, contact Dell for technicalassistance.offyellowoffoffA possible power supply orpower cable failure hasoccurred.Perform the procedure in "Power Problems."If the problem is still not resolved, contact Dell for technicalassistance.