System-board LEDs and controls
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.
The following illustration shows the LEDs on the microprocessor 2 expansion
board.
Figure 12. LEDs and controls on system board
Chapter 2. Installing optional devices
31
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