1. Shutdown the computer.2. Press and hold the key, while pressing the power button, and then release both.The Enhanced Pre-boot System Assessment window displays, listing all devices detected in thecomputer. The diagnostics starts running the tests on all the detected devices.3. On the boot menu screen, select the Diagnostics option.The Enhanced Pre-boot System Assessment window displays, listing all devices detected in thecomputer. The diagnostics starts running the tests on all the detected devices.4. If you wish to run a diagnostic test on a specific device, press and click Yes to stop thediagnostic test.5. Select the device from the left pane and click Run Tests6. If there are any issues, error codes are displayed.Note the error code and contact Dell.Device Status LightsTable 14. Device Status LightsTurns on when you turn on the computer and blinks when the computer is in a powermanagement mode.Turns on when the computer reads or writes data.Turns on steadily or blinks to indicate battery charge status.Turns on when wireless networking is enabled.The device status LEDs are usually located either on the top or left side of the keyboard. They display thestorage, battery and wireless devices connectivity and activity. Apart from that they can be useful as adiagnostic tool when there's a possible failure to the system.The following table lists how to read the LED codes when possible errors occur.Table 15. LED LightsStorage LED Power LED Wireless LED Fault DescriptionBlinking Solid Solid A possible processor failure has occurred.Solid Blinking Solid The memory modules are detected but encounteredan error.Blinking Blinking Blinking A system board failure has occurred.Blinking Blinking Solid A possible graphics card/video failure has occurred.Blinking Blinking Off System failed on hard drive initialization OR Systemfailed in Option ROM initialization.Blinking Off Blinking The USB controller encountered a problem duringinitialization.Solid Blinking Blinking No memory modules are installed/detected.48
