Dell Latitude 3500 Manual de servicio

L-BIST

L-BIST (prueba del riel de alimentación de la pantalla LCD) es una mejora de los diagnósticos de códigos de error LED únicos y se inicia automáticamente durante la POST. L-BIST comprobará el riel de alimentación de la LCD. Si no se suministra alimentación a la LCD (es decir, si falla el circuito L-BIST), el LED de estado de la batería parpadeará con un código de error [2,8].

DELLPS_NOTE Si L-BIST falla, LCD-BIST no puede funcionar porque no se suministra alimentación a la LCD.

Running the L-BIST

  1. Press the power button to start up the system.
  2. If the system does not start up normally, look at the battery status LED. If the battery status LED flashes an error code [2,8], there is a failure on the LCD power rail of the system board, hence there is no power supplied to the LCD.
  3. Replace the system board in this case.

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