HP integrity superdome x Service Manual page 61

Item Name
12 Local Clock Distribution
LED
13 External Clock Input LED
14 Global clock connector 3
15 Global clock connector 2
16 Global clock connector 1
17 Enclosure DVD module
USB port
OA module LEDs and components
Description
Indicates the status of the global clock signal distributed to blades in
the compute enclosure.
Green = OK
Flashing yellow = Critical error
Indicates the status of the global clock signal distributed to connected
enclosures.
Flashing green = No clock signal expected
Unused for this release of the system.
NOTE:
To ensure proper system functionality, you must connect the
USB cable between the OA module and the GPSM.
Troubleshooting 61