IBM RS/6000 H50, Installation And Service Manual

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Step 1520-7
One of the parts that was removed or unplugged is causing the problem. Install or
connect the parts in the following order.
1. CPU card(s).
2. Memory cards. (One at a time)
3. SCSI devices, lowest bay to highest bay.
4. PCI cards, lowest slot to highest slot.
5. ISA cards, lowest slot to highest slot.
6. 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 system unit power cables from the power supplies.
3. Install or connect one of the parts in the list.
4. Connect the system unit power cables to the power supplies.
5. Turn the power on.
Does the fan in the power supply 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 parts have been replaced, 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 2-12 in this MAP and follow the instructions for the new symptom.
YES Go to "MAP 410: Repair Checkout" in the Diagnostic Information for Mul-
tiple Bus Systems.
2-16
RS/6000 Enterprise Server Model H50 Installation and Service Guide