Dell Precision KR019 Setup And Quick Reference Manual

Also see for Precision R5400: Brochure Technical guide Specifications Manual Manual

Troubleshooting 29TroubleshootingCAUTION: To guard against the likelihood of electric shock, laceration by movingfan blades, or other expected injuries, always unplug your computer from theelectrical outlet before opening the cover.CAUTION: Before you begin any of the procedures in this section, follow thesafety instructions that shipped with your computer.Troubleshooting ToolsPower LightCAUTION: Before you begin any of the procedures in this section, read and followthe safety instructions provided with your computer.The power light located on the front of the computer illuminates and remainssolid or blinks to indicate different states:• If the power light is green and the computer is not responding, see"Diagnostic Lights" in your Service Manual.• If the power light is blinking green, the computer is in standby mode. Pressa key on the keyboard, move the mouse, or press the power button toresume normal operation.• If the power light is off, the computer is either turned off or is notreceiving power.– Reseat the power cable into both the power connector on the back ofthe computer and the electrical outlet.– If the computer is plugged into a power strip, ensure that the powerstrip is plugged into an electrical outlet and that the power strip isturned on.– Bypass power protection devices, power strips, and power extensioncables to verify that the computer turns on properly.– Ensure that the electrical outlet is working by testing it with anotherdevice, such as a lamp.