Dell OptiPlex 3040M Series Owner's Manual

Also see for OptiPlex HUB: Owner's manual Quick start guide Owner's manual Troubleshooting guide Setup guide

3Troubleshooting your computerYou can troubleshoot your computer using indicators like diagnostic lights, beep codes, and errormessages during the operation of the computer.Diagnostic power LED codesTable 1. Diagnostic power LED codesPower LED light status Possible cause Troubleshooting stepsOff The computer is either turned off oris not receiving power or inHibernation mode.• Re-seat the power cable in thepower connector on the back ofthe computer and the electricaloutlet.• If the computer is plugged into apower strip, ensure that thepower strip is plugged into anelectrical outlet and is turned on.Also, bypass power protectiondevices, power strips, and powerextension cables to verify thatthe computer turns on properly.• Ensure the electrical outlet isworking by testing it withanother device, such as a lamp.Steady/Blinking Amber Computer fails to complete POST orprocessor failure.• Remove and reinstall any cards.• Remove and reinstall thegraphics card, if applicable.• Ensure the power cable isconnected to the system boardand processor.Blinking White Light Computer is in sleep mode. • Press the power button to bringthe computer out of the sleepmode.• Ensure all power cables aresecurely connected to thesystem board.• Ensure the main power cableand front panel cable areconnected to the system board.Steady White The computer is fully functional andin the On state.If the computer is not responding,do the following:• Ensure the display is connectedand turned on.21