Reference Guide

Enhanced PSA
You can use the Enhanced Pre-Boot System Assessment (ePSA) to diagnose various hardware problems. The ePSA tests
devices such as the system board, keyboard, display, memory, hard drive, and so on.
NOTE: ePSA may not be supported on all computers.
The ePSA home screen is divided into three areas:
● Devices window—Appears on the left of the ePSA home screen. It displays all the devices in your computer and can be
used to select devices.
● Control window—Appears at the bottom-right of the ePSA home screen.
○ Selecting the Thorough Test Mode check-box in the control window maximizes the extent and duration of the tests.
○ Status bar appears at the bottom left side of the control window and indicates the overall completion of the tests.
○ To test selected devices, click or tap Run Tests.
○ To exit the ePSA and restart your computer, click or tap Exit.
● Status window—Appears on the right of the ePSA home screen.
The status area has four tabs:
● Configuration—Displays detailed configuration and status information about all devices that can be tested using ePSA.
● Results— Displays all tests that are executed, their activity, and results for each test.
● System Health—Displays the status of the battery, power adapter, fans, and so on.
● Event Log—Provides detailed information about all tests.
The Stat column displays the status of the tests.
LCD BIST
LCD BIST (Built‑In Self Test) helps you determine if a display problem is caused by the LCD or some other part. The test may
displays different colors and text on the screen and if you do not notice the problem during the test then the issue lies outside
of the LCD.
NOTE:
Peripherals may have diagnostics specific to them. For more information, see the documentation shipped along with
your peripheral.
Starting LCD BIST
1. Turn on or restart your computer.
2. Press F12 at the Dell logo to access the BIOS setup program.
NOTE:
If you wait too long and the operating system logo appears, continue to wait until you see the Windows desktop,
then restart your computer and try again.
3. Select Diagnostics and press Enter.
4. If you do not see colored lines on the screen, press N to enter the LCD BIST.
Invoking ePSA
To invoke ePSA:
1. Restart the computer.
2. Press F12 at the Dell logo to access the BIOS setup program.
NOTE:
If you wait too long and the operating system logo appears, continue to wait until you see the Windows desktop,
then restart your computer and try again
3. Select Diagnostics and press Enter.
4. Follow the on-screen instructions to complete the test and note any error messages that appear.
If a component fails the test, the test stops, the computer beeps, and an error code is displayed. Note the error code(s) and
search for solutions at www.dell.com/support or Contact Dell.
Follow the instructions on the screen to continue to the next test, retest the component that failed, or stop the test and restart
the computer.
Troubleshooting
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