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.
GUID-5FC0D943-B848-4BDC-9A26-78A5E88FDA45
Running the ePSA diagnostics
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 is displayed, listing all devices detected in the computer. The diagnostics starts
running the tests on all the detected devices.
4
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.
GUID-8D55A66D-C835-4685-B13C-A5E9659C765D
Real Time Clock (RTC) reset
The Real Time Clock (RTC) reset function allows you or the service technician to recover the recently launched model Dell Latitude and
Precision systems from select
No POST/No Boot/No Power
situations. You can initiate the RTC reset on the system from a power off
state only if it is connected to AC power. Press and hold the power button for 25 seconds. The system RTC reset occurs after you release
the power button.
NOTE:
If AC power is disconnected from the system during the process or the power button is held longer than 40 seconds, the
RTC reset process is aborted.
The RTC reset will reset the BIOS to Defaults, un-provision Intel vPro and reset the system date and time. The following items are
unaffected by the RTC reset:
•
Service Tag
•
Asset Tag
•
Ownership Tag
•
Admin Password
•
System Password
•
HDD Password
•
Key Databases
•
System Logs
The following items may or may not reset based on your custom BIOS setting selections:
•
The Boot List
•
Enable Legacy OROMs
•
Secure Boot Enable
•
Allow BIOS Downgrade
Diagnostics
103
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