IBM PS700, Technical Overview And Introduction

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IBM BladeCenter PS700, PS701, and PS702 Technical Overview and Introduction
Light Path
The Light Path LED feature is used for the PS700, PS701, and PS702 blades. In the Light
Path LED implementation, when a fault condition is detected on the POWER7
processor-based system, a FRU LED is illuminated, which is rolled up to the system fault
LED. The Light Path system pinpoints the exact part by turning on the FRU fault LED
associated with the part to be replaced. The Light Path diagnostic FRU fault LEDs can be
reviewed from the AMM (as shown in Figure 4-4) or reviewed directly on the blade after
removal from the BladeCenter chassis using the Light Path diagnostic switch on the blade
planar.
Figure 4-4 AMM blade LED details
The system can clearly identify components for replacement by using specific
component-level LEDs, and can also guide the servicer directly to the component by signaling
(turning on solid) the system fault LED, enclosure fault LED, and the component FRU fault
LED.
After the repair, the LEDs shut off if the problem is fixed.