Use this information as an overview of light path diagnostics.
Light path diagnostics is a system of LEDs on the control
panel and on various internal components of the blade server. When
an error occurs, LEDs can be lit throughout the blade server to help
identify the source of the error.
After you remove the blade server, you can press and hold
the light path diagnostics switch for a maximum of 25 seconds to light
the LEDs and locate the failing component. The following components
have this feature:
- Storage drives
- Light path diagnostics panel
- Microprocessors
- Memory modules (DIMMs)