The following illustration shows the light-emitting diodes (LEDs) on the system board.
Any error LED can be lit after ac power has been removed from the system-board tray so that you can isolate a problem. After ac power has been removed from the system-board tray, power remains available to these LEDs for up to 90 seconds. To view the error LEDs, press and hold the light path button on the system board to light the error LEDs. The error LEDs that were lit while the system-board tray was running will be lit again while the button is pressed.
The following illustration shows the LEDs and controls on the system board.
Figure 1. LEDs and controls on system board
