HP Surestore Disk Array 12h - And FC60 Service Manual page 248

Controller Enclosure Midplane Servicing Notes
The controller enclosure's chassis must be serviced by a trained
C
AUTION
service technician ONLY.
To replace the controller enclosure midplane, replace the entire chassis, not just the board.
Servicing the chassis is a major task that requires removing and disassembly. Before
assuming that the midplane is defective, make sure you have thoroughly investigated all
other possibilities, including:
•
Checking and replacing any defective interface cables, terminators, and host adapters.
•
Verifying that the controller modules and memory modules are functioning properly.
•
Verifying that the cooling system is working properly and that the controller modules
are not overheated.
Controller Enclosure Troubleshooting
248