Troubleshooting
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:
•
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
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.
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.
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.
Real Time Clock 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.
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Troubleshooting
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Содержание Latitude 5490
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Страница 44: ...c Lift the display assembly from the computer 44 Removing and installing components ...
