Dell Latitude 5490 Owners Manual - Page 94

Running the ePSA Diagnostics, Real Time Clock reset

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Running the ePSA Diagnostics Invoke diagnostics boot by either of the methods that are suggested below: 1 Power on the computer. 2 As the computer boots, press the F12 key when the Dell logo is displayed. 3 In the boot menu screen, use Up/Down arrow key to select the Diagnostics option and then press Enter. 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. 4 Press the arrow in the lower-right corner to go to the page listing. The detected items are listed and tested. 5 To run a diagnostic test on a specific device, press Esc and click Yes to stop the diagnostic test. 6 Select the device from the left pane and click Run Tests. 7 If there are any issues, error codes are displayed. Note the error code and contact Dell. or 8 Shut down the computer. 9 Press and hold the Fn key, while pressing the power button, and then release both. 10 Repeat steps 3-7 above. Real Time Clock reset The Real Time Clock (RTC) reset function allows you to recover your Dell system from No POST/No Boot/No Power situations. To initiate the RTC reset on the system make sure system is in a power-off state and is connected to power source . Press and hold the power button for 25 seconds and then release the power button. Go to how to reset real time clock. 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 • TPM on and Active • 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 94 Troubleshooting

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Running the ePSA Diagnostics
Invoke diagnostics boot by either of the methods that are suggested below:
1
Power on the computer.
2
As the computer boots, press the F12 key when the Dell logo is displayed.
3
In the boot menu screen, use Up/Down arrow key to select the
Diagnostics
option and then press
Enter
.
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.
4
Press the arrow in the lower-right corner to go to the page listing.
The detected items are listed and tested.
5
To run a diagnostic test on a
specific
device, press Esc and click
Yes
to stop the diagnostic test.
6
Select the device from the left pane and click
Run Tests
.
7
If there are any issues, error codes are displayed.
Note the error code and contact Dell.
or
8
Shut down the computer.
9
Press and hold the Fn key, while pressing the power button, and then release both.
10
Repeat steps 3–7 above.
Real Time Clock reset
The Real Time Clock (RTC) reset function allows you to recover your Dell system from
No POST/No Boot/No Power
situations. To initiate
the RTC reset on the system make sure system is in a
power-off
state and is connected to power source . Press and hold the power button
for 25 seconds and then release the power button. Go to
how to reset real time clock
.
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
•
TPM on and Active
•
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
94
Troubleshooting