Dell Vostro 7500 Service Manual - Page 85

Display panel built-in self-test (LCD-BIST), Outcome, SupportAssist diagnostics

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Display panel built-in self-test (LCD-BIST) About this task Steps 1. Press and hold the D key, and then press the power button. 2. Release both the D key and the power button when the computer begins POST. 3. The display panel begins to display a solid color, or cycling through different colors. NOTE: The sequence of colors may vary depending on the different display panel vendors. The user only must ensure that the colors are being displayed correctly without distortion or graphical anomalies. 4. The computer reboots at the end of the last solid color. Outcome About this task The following table shows the outcome of running different types of BIST. Table 20. BIST outcome Off Solid amber M-BIST No fault detected with system board. Indicates a problem with the system board. SupportAssist diagnostics About this task The SupportAssist diagnostics (previously known as ePSA diagnostics) performs a complete check of your hardware. The SupportAssist diagnostics is embedded with the BIOS and is launched by the BIOS internally. The embedded SupportAssist diagnostics provides a set of options for particular devices or device groups allowing you to: • Run tests automatically or in an interactive mode Troubleshooting 85

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Display panel built-in self-test (LCD-BIST)
About this task
Steps
1.
Press and hold the
D
key, and then press the
power
button.
2.
Release both the
D
key and the
power
button when the computer begins POST.
3.
The display panel begins to display a solid color, or cycling through different colors.
NOTE:
The sequence of colors may vary depending on the different display panel vendors. The user only must ensure
that the colors are being displayed correctly without distortion or graphical anomalies.
4.
The computer reboots at the end of the last solid color.
Outcome
About this task
The following table shows the outcome of running different types of BIST.
Table 20. BIST outcome
M-BIST
Off
No fault detected with system board.
Solid amber
Indicates a problem with the system board.
SupportAssist diagnostics
About this task
The SupportAssist diagnostics (previously known as ePSA diagnostics) performs a complete check of your hardware. The SupportAssist
diagnostics is embedded with the BIOS and is launched by the BIOS internally. The embedded SupportAssist diagnostics provides a set of
options for particular devices or device groups allowing you to:
•
Run tests automatically or in an interactive mode
Troubleshooting
85