IBM H Series Installation And Service Manual page 62

Step 1520-9
One of the parts that was removed or unplugged is causing the problem. Install or
connect the parts in the following order:
1. Processor card(s) (One at a time)
2. Memory card(s) (One at a time)
3. Disk drive cage backplane power cable(s).
4. SCSI device power cable(s), lowest bay to highest bay
5. ISA adapters, lowest slot to highest slot
6. PCI adapters, lowest slot to highest slot
7. Fans
Turn the power on after each part is installed or connected. If the system does not
power on or the power light on the operator panel does not stay on, the most
recently installed or connected part is causing the failure.
1. Turn the power off.
2. Unplug the power cords from the power supplies.
3. Install or connect one of the parts in the list.
4. Plug the power cords into the power supplies.
5. Turn the power on.
Do the power supply fans turn on and the power light on the operator panel
come on and stay on?
NO Replace the last part installed.
If the memory card was just installed, remove all of the memory modules.
If the system does not come up, replace the memory card.
Re-install the memory modules, one pair at a time, until the problem
recurs. Replace the memory module pair that was just installed.
Note: The memory module pair must be installed in slots that are next to
each other. For example, install the pair in J1 and J2, not J1 and J3.
Repeat these steps until all the parts have been installed.
If the symptom did not change and all the FRUs have been exchanged,
call your service support person for assistance.
If the symptom has changed, check for loose cards, cables, and obvious
problems. If you do not find a problem, return to "Step 1520-1" on
page 2-20 in this MAP and follow the instructions for the new symptom.
2-28
RS/6000 Enterprise Server Model H Series Installation and Service Guide