Diagnostics
This chapter details the built in troubleshooting features to diagnose the Dell systems. It also lists the invoking instructions along with
related information for each diagnostics method.
Topics:
• ePSA Diagnostics
• LCD Built-in Self Test
• Battery Status Lights
• Diagnostic LED
• Wi-Fi power cycle
• BIOS recovery
• Self-Heal
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
NOTE:
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.
Running ePSA diagnostics
Invoke diagnostics by either of the methods that are suggested below:
• Tap F12 key on keyboard, as the Dell splash screen appears, until you get message Diagnostic Boot Selected.
• On the one time boot menu screen, use Up/Down arrow key to select the Diagnostics option and then press <Return>.
• Press and Hold Function(Fn) key on the keyboard and Press the Power button to power on the system.
ePSA User Interface
This section contains information on ePSA 3.0’s Basic and Advanced Screen.
ePSA opens basic screen on start. You can switch to advanced screen using the arrow icon on the bottom. Advanced screen shows
detected devices on the left column. Specific test can be included or excluded only in the interactive mode.
ePSA Basic Screen
The Basic Screen has minimal controls which allows easy navigation for user to start or stop the diagnostic.
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