Dell Enhanced Pre-Boot System Assessment - Epsa Diagnostic 3.0; Running The Epsa Diagnostics; Built-In Self-Test (Bist); M-Bist - Dell Latitude 5480 Owner's Manual

Dell Enhanced Pre-Boot System Assessment — ePSA
Diagnostic 3.0
You can invoke the ePSA diagnostics by either of the following ways :
● Press the F12 key when the system posts and choose ePSA or Diagnostics option on One Time Boot Menu.
● Press and hold Fn(Function key on keyboard) and Power On (PWR) the system.

Running the ePSA diagnostics

Steps
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.
4. Click the arrow key at the bottom left corner.
Diagnostics front page is displayed.
5. Press 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.

Built-in self-test (BIST)

M-BIST

M-BIST (Built In Self-Test) is the system board's built-in self-test diagnostics tool that improves the diagnostics accuracy of
system board embedded controller (EC) failures.
NOTE: M-BIST can be manually initiated before POST (Power On Self Test).
How to run M-BIST
NOTE: M-BIST must be initiated on the system from a power-off state either connected to AC power or with battery only.
1. Press and hold both the M key on the keyboard and the power button to initiate M-BIST.
2. With both the M key and the power button held down, the battery indicator LED may exhibit two states:
a. OFF: No fault detected with the system board
b. AMBER: Indicates a problem with the system board
3. If there is a failure with the system board, the battery status LED will flash one of the following error codes for 30 seconds:
Table 10. LED error codes
Blinking Pattern
Amber
2
2
1
2
98 Troubleshooting
White
1
8
1
4
Possible Problem
CPU Failure
LCD Power Rail Failure
TPM Detection Failure
Unrecoverable SPI Failure