Dell T7400 manual Test based on the symptom of the problem you are having, Tab Function

Option	Function
Extended Test	Performs a thorough check of system devices. The test
	typically takes an hour or more and periodically requires
	your input to answer specific questions.
Custom Test	Tests a specific device in the system and can be used to
	customize the tests you want to run.
Symptom Tree	Lists a number of common symptoms and allows you to select
	a test based on the symptom of the problem you are having.

For any problem encountered during a test, a message appears with an error code and a description of the problem. Write down the error code and problem description exactly as it appears and follow the instructions on the screen. If you cannot resolve the problem, contact Dell (see "Contacting Dell" in your User’s Guide).

NOTE: The Service Tag for your computer is located at the top of each test screen. When contacting Dell support, have your Service Tag ready.

The following tabs provide additional information for tests run from the Custom Test or Symptom Tree option:

Tab	Function
Results	Displays the results of the test and any error conditions
	encountered.
Errors	Displays error conditions encountered, error codes, and the
	problem description.
Help	Describes the test and any requirements for running the test.
Configuration	Displays the hardware configuration for the selected device.
(Custom Test only)	The Dell Diagnostics obtains configuration information for
	all devices from the system setup program, memory, and
	various internal tests, and it displays the information in the
	device list in the left pane of the screen.
	NOTE: The device list may not display the names of all the
	components installed on your computer or all devices attached
	to your computer.
Parameters	Allows you to customize the test, if applicable, by changing
(Custom Test only)	the test settings.

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