Service Manual

You can also download it from the Dell Support website to troubleshoot and fix your computer when it fails to boot into their
primary operating system due to software or hardware failures.
For more information about the Dell SupportAssist OS Recovery, see Dell SupportAssist OS Recovery User's Guide at
www.dell.com/support.
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 SupportAssist Pre-Boot System Performance Check.
System diagnostic lights
When static, the power and battery-charge status light indicates the power mode that your computer is in. When blinking
in different patterns, the power and battery-charge status light indicates the respective issues that your computer is
encountering.
Static power and battery-charge status light
The following table lists the status of your computer based on the power and battery-charge status light.
Table 19. Power and battery-charge status light
Power and battery-charge status light Status of computer
Solid white
● The power adapter is connected and the battery is fully charged.
● The power adapter is connected and the battery has more than five
percent charge.
Amber The computer is running on battery and the battery has less than five
percent charge.
Off The computer is in sleep state, hibernation, or turned off.
Blinking power and battery-charge status light
The power and battery-status light blinks alternately between amber and off to indicate issues that your computer is
encountering.
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.
Troubleshooting
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