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Locate the Service Tag or Express Service Code of
your Dell computer
Your Dell computer is uniquely identified by a Service Tag or Express Service Code. To view relevant support resources for your
Dell computer, we recommend entering the Service Tag or Express Service Code at www.dell.com/support.
For more information on how to find the Service Tag for your computer, see
SupportAssist | On-board Diagnostics
About this task
The SupportAssist | On-board Diagnostics performs a complete check of your hardware.
This diagnostic is the new on-board diagnostic tool and replaces the ePSA 3.0 diagnostics. It has a clean and modern user
interface, quicker tests, simplified messaging.
SupportAssist | On-board Diagnostics can be initiated by one of the following methods:
● Pressing F12 to enter one-time Boot Menu and selecting Diagnostics to initiate the diagnostics OR Fn + Power
● BIOS POST detecting a hardware failure or error and initiating the diagnostics
The SupportAssist | On-board Diagnostics 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 in either Quick Test Mode or Advanced Test Mode
● Run thorough tests to introduce additional test options to provide extra information about the failed device(s)
● Run tests in either Automatic Mode or Interactive Test Mode
● Run interactive tests on LCD panel and keyboard
● Display or save test results
● View status messages that indicate if the tests are completed successfully
● View error messages that indicate if problems were encountered during the test
NOTE:
Some tests for specific devices require user interaction. Ensure that you are present at the computer terminal when
the diagnostic tests are performed.
For more information, see
System diagnostic lights
Power and battery-status light
Indicates the power and battery-charge status.
Solid white—Power adapter is connected and the battery has more than 5% charge.
Amber—Computer is running on battery and the battery has less than 5% charge.
Off
● Power adapter is connected, and the battery is fully charged.
● Computer is running on battery, and the battery has more than 5% charge.
● Computer is in sleep state, hibernation, or turned off.
The power and battery-status light blinks amber along with beep codes indicating failures.
For example, the power and battery-status light blinks amber two times followed by a pause, and then blinks white three times
followed by a pause. This 2,3 pattern continues until the computer is turned off indicating no memory or RAM is detected.
The following table shows different power and battery-status light patterns and associated problems.
Table 4. LED codes
Diagnostic light codes
1,1
SupportAssist Pre-Boot System Performance
Problem description
TPM detection failure
Locate the Service Tag for your Dell
Check.
Recommended solutions
Replace the system board.
Laptop.
Troubleshooting
83
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