Dell P21T owner manual Enhanced Pre-Boot System Assessment ePSA Diagnostics

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Diagnostics

If you experience a problem with your computer, run the ePSA diagnostics before contacting Dell for technical assistance. The purpose of running diagnostics is to test your computer's hardware without requiring additional equipment or risking data loss. If you are unable to fix the problem yourself, service and support personnel can use the diagnostics results to help you solve the problem.

Enhanced Pre-Boot System Assessment (ePSA) Diagnostics

The ePSA diagnostics (also known as system diagnostics) performs a complete check of your hardware. The ePSA is embedded with the BIOS and is launched by the BIOS internally. The embedded system diagnostics provides a set of options for particular devices or device groups 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 testing

CAUTION: Use the system diagnostics to test only your computer. Using this program with other computers may cause invalid results or error messages.

NOTE: Some tests for specific devices require user interaction. Always ensure that you are present at the computer terminal when the diagnostic tests are performed.

You can launch the ePSA diagnostics by two ways:

1.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.

The Enhanced Pre-boot System Assessment window displays, listing all devices detected in the computer. 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 <Esc> and click Yes to stop the diagnostic test.

5.Select the device from the left pane and click Run Tests

6.If there are any issues, error codes are displayed. Note the error code and contact Dell.

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Contents Dell Latitude Page Contents Contacting Dell Before Working Inside Your Computer Working on Your ComputerTurning Off Your Computer After Working Inside Your Computer Removing the Base Cover Recommended ToolsFollow the procedures in After Working Inside Your Computer Installing the Base CoverRemoving the Battery Removing the Audio Board Installing the BatteryBase cover Battery Removing the Display Assembly Installing the Audio BoardPage Removing the Display Bezel Installing the Display AssemblyBase cover Battery Display assembly Installing the Display Bezel Removing the Display Panel Base cover Battery Display assembly Display bezelRemoving the Camera Installing the Display PanelRemoving the Power-Connector Port Installing the CameraRemoving the Hard-Drive Assembly Installing the Power-Connector PortPage Installing the Hard-Drive Assembly Removing the Memory Installing the LED BoardBase cover Battery Hard-drive assembly Removing the LED BoardRemoving the Coin-Cell Battery Installing the MemoryFollow the steps in Before Working Inside Your Computer Installing the Coin-Cell BatteryRemoving the Keyboard Trim Removing the Keyboard Installing the Keyboard TrimBattery Base cover Keyboard trim Installing the Keyboard Removing the Heatsink Installing the Wlan CardRemoving the Wlan Card Installing the Heatsink Removing the System Board Base cover Battery Memory HeatsinkRemoving the Speaker Installing the System BoardBase cover Battery Memory Heatsink System board Installing the Speaker Navigation Keys Boot SequenceUefi System Setup OptionsSATA-0 Video Functional in the operating system KEK Page Post Behavior Wlan System and Setup Password Updating the BiosAssigning a System Password and Setup Password Technical Specifications USB Page Page Page Enhanced Pre-Boot System Assessment ePSA Diagnostics DiagnosticsDevice Status Lights Battery Status Lights Contacting Dell