Enhanced Pre-Boot System Assessment - Epsa Diagnostics; Running The Epsa Diagnostics; Testing Memory Using Epsa - Dell Precision 7520 Owner's Manual

Lithium-ion batteries can swell for various reasons such as age, number of charge cycles, or exposure to high heat. For more
information on how to improve the performance and lifespan of the laptop battery and to minimize the possibility of occurrence
of the issue, see Dell Laptop Battery - Frequently Asked
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:
The ePSA diagnostics can be initiated by the FN+PWR buttons while powering on the computer.
● 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
Some tests for specific devices require user interaction. Always ensure that you are present at the computer
NOTE:
terminal when the diagnostic tests are performed.

Running the ePSA Diagnostics

Invoke diagnostics boot by either of the methods that are suggested below:
1. Power on the computer.
2. As the computer boots, press the F12 key when the Dell logo is displayed.
3. In the boot menu screen, use Up/Down arrow key to select the Diagnostics option and then press Enter.
The Enhanced Pre-boot System Assessment window displays, listing all devices detected in the computer.
NOTE:
The diagnostics starts running the tests on all the detected devices.
4. Press the arrow in the lower-right corner to go to the page listing.
The detected items are listed and tested.
5. To run a diagnostic test on a specific device, press Esc and click Yes to stop the diagnostic test.
6. Select the device from the left pane and click Run Tests.
7. If there are any issues, error codes are displayed.
Note the error code and contact Dell.
or
8. Shut down the computer.
9. Press and hold the Fn key, while pressing the power button, and then release both.
10. Repeat steps 3–7 above.

Testing memory using ePSA

1. Turn on or restart your computer.
2. Press F12 or press Fn+PWR to invoke the ePSA diagnostics.
The PreBoot System Assessment (PSA) starts on your computer.
If you wait too long and the operating system logo appears, continue to wait until you see the login screen/
NOTE:
desktop screen. Turn off the computer and try again.
If the memory test results in 25 or less errors, then the RMT basic feature automatically fixes the issues. The test will indicate
a pass result since the defect(s) have been removed. If the memory test results in 26 - 50 errors, the RMT basic feature masks
the defective memory blocks and results in pass with no memory replacement requirement. If the memory test results in more
than 50 errors, then the test is stalled and the result indicates that memory module replacement is required.
Questions.
Troubleshooting 79