Dell Inspiron 7390 2n1 Service Manual

Contents

TroubleshootingEnhanced Pre-Boot System Assessment (ePSA)diagnosticsThe ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded with theBIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular devices or devicegroups allowing you to:• Run tests automatically or in an interactive mode• Repeat tests• Display or save test results• Run thorough tests to introduce additional test options to provide extra information about the failed device(s)• View status messages that inform you if tests are completed successfully• View error messages that inform you of problems encountered during testingNOTE: Some tests for specific devices require user interaction. Always ensure that you are present at the computer terminalwhen the diagnostic tests are performed.Running the ePSA diagnostics1 Turn on your 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 at the bottom left corner.Diagnostics front page is displayed.5 Click 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 the diagnostic 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.System diagnostic lightsBattery-status lightIndicates the power and battery-charge status.Solid white — Power adapter is connected and the battery has more than 5 percent charge.Amber — Computer is running on battery and the battery has less than 5 percent charge.Off• Power adapter is connected and the battery is fully charged.4080 Troubleshooting

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