Dell Pro 14 Essential PV14255 Handleiding (140 Pagina's)

Handleiding

● View status messages that inform you when the tests are completed successfully.

● View error messages that inform you of problems encountered during testing.

NOTE: Some tests for specific devices require user interaction. Always ensure that you are present at the computer when

the diagnostic tests are performed.

For more information, see How to Run Dell Preboot Diagnostics and Hardware Tests on Your Dell Computer.

Running the SupportAssist Pre-Boot System Performance Check

Steps

1. Turn on your computer.

2. As the computer boots, press the F12 key.

3. On the boot menu screen, select Diagnostics.

The diagnostic quick test begins.

NOTE: For more information about running the SupportAssist Pre-Boot System Performance Check on a specific

device, see Dell Support Site.

4. If there are any issues, error codes are displayed.

Note the error code and validation number and contact Dell.

Built-in self-test (BIST)

Motherboard Built-In Self-Test (M-BIST)

M-BIST is the system board onboard self-test diagnostics tool that improves the diagnostics accuracy of system board

Embedded Controller (EC) failures.

NOTE:

M-BIST can be manually initiated before Power On Self-Test (POST).

How to run M-BIST

NOTE:

Before initiating M-BIST, ensure that the computer is in a power-off state.

1. Press and hold both the M key and the power button to initiate M-BIST.

2. The battery-status light may exhibit two states:

● Off: No fault was detected.

● Amber and White: Indicates a problem with the system board.

3. If there is a failure with the system board, the battery-status light flashes one of the following error codes for 30 seconds:

Table 22.

LED error codes

Blinking Pattern Possible Problem

Amber White

2 1 CPU Failure

2 8 LCD Power Rail Failure

1 1 TPM Detection Failure

2 4 Memory/RAM failure

4. If there is no failure with the system board, the LCD cycles through the solid color screens (that are described in the

LCD-BIST) for 30 seconds and then turn off.

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Troubleshooting

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