For more information, see Dell EPSA Diagnostic 3.0.Running the ePSA diagnostics1 Power-on the computer.2 As the computer boots, press the F12 key as the Dell logo appears.3 On the boot menu screen, select the Diagnostics option.4 Click the arrow key at the bottom left corner.Diagnostics front page is displayed.5 Press the arrow in the lower-right corner to go to the page listing.The items detected are listed.6 To run a diagnostic test on a specific device, press Esc and click Yes to stop thediagnostic test.7 Select the device from the left pane and click Run Tests.8 If there are any issues, error codes are displayed.Note the error code and validation number and contact Dell.DiagnosticsThe computer POST (Power On Self Test) ensures that it meets the basic computerrequirements and the hardware is working appropriately before the boot processbegins. If the computer passes the POST, the computer continues to start in a normalmode. However, if the computer fails the POST, the computer emits a series of LEDcodes during the start-up. The system LED is integrated on the Power button.The following table shows different light patterns and what they indicate.Table 9. DiagnosticsNumber of LED flashes Problem description1 System board: BIOS and ROM failure2 No memory or RAM detected3 System board or chipset error4 Memory or RAM failure5 CMOS battery failure6 Video card or chip failure139
