Chapter 4
Removing and Replacing Components
I/O Baseboard Assembly
67
I/O Baseboard Assembly
The I/O baseboard assembly is located in the rear service bay.
WARNING
Ensure that the system is powered down and all power sources have been
disconnected from the server prior to removing or replacing the I/O baseboard
assembly.
Voltages are present at various locations within the server whenever an AC power
source is connected. This voltage is present even when the main power switch is in
the off position.
Failure to observe this warning could result in personal injury or damage to
equipment.
CAUTION
Failure to properly complete the steps in this procedure will result in erratic system behavior
or system failure. For assistance with this procedure contact your local HP Authorized Service
Provider.
Observe all ESD safety precautions before attempting this procedure. Failure to follow ESD
safety precautions could result in damage to the server.
Removing the I/O Baseboard Assembly
To remove the I/O baseboard assembly, perform the following steps:
CAUTION
Before removing your I/O baseboard assembly, save all boot configuration settings. These
values will need to be reset after replacing your I/O baseboard assembly.
Step 1. If rack mounted, slide the HP Server out from the rack until it stops. (Refer to the hp9000 rp4440
Installation Guide for additional information.)
Step 2. Remove the top cover. (Refer to “Front and Top Covers” on page 39.)
Step 3. Remove the three chassis fan units. (Refer to “Hot-Swap Chassis Fan Unit” on page 63.)
Step 4. Unplug all external cabling attached to ports at the rear of the I/O baseboard.
Step 5. Unplug the SCSI cables attached to the HBA board in PCI slot 1.
CAUTION
When unplugging the SCSI cables, note the labeling on the SCSI A and SCSI B
channel cables. When re-plugging in these cables, you must match each cable with
its appropriate socket on the SCSI HBA. If the cables are mismatched your system
may not reboot. Both cables and sockets are clearly marked with the correct channel.
Step 6. Lift up on the locking lever attached to the side of the power supply cage to unplug the I/O
baseboard from the socket on the midplane riser board. See Figure 4-20, “I/O Board Locking Lever.”
Step 7. Slide the I/O baseboard assembly all the way to the rear until removed from chassis.