IBM Power System POWER7 Series Common Service Procedures page 157

a. If the procedure is being done from an IBM i partition, the system prevents the procedure from
being done from a console or terminal session connected through the expansion unit being
powered off. A different console or terminal session not connected through the expansion unit
being powered off must be found, or the server must be powered off. See Powering on and
powering off a system for instruction on powering off the server, then return to the procedure
that sent you here.
b. If I/O activity to resources in the expansion unit was not ended as described in step 12, the
power off will not continue and messages will be presented indicating which partition resources
need to be varied off or unconfigured. Similarly for other conditions described previously in this
page that prevent the power off.
c. Carefully follow all instructions given by the utility. For instance, you may be informed that
critical disk resources exist in the expansion unit and that panel function 69 must be used to
power the expansion unit back on.
d. Wait for the expansion unit to power off. This might take up to 15 minutes depending on the
configuration.
e. When the utility gives notification that the power off has completed, ensure that the expansion
unit is actually powered off by verifying that one of the two air moving devices (AMDs) in the
expansion unit has stopped and that the power LED/indicator on the expansion unit control
panel is off.
f. If the expansion unit does not power off after more than 15 minutes, the system may be hung. If
this occurs, contact your service provider for assistance.
15. Were you directed here to power off the expansion unit to set the expansion unit configuration ID or
the machine type-model-serial numbers (MTMS)?
No: Go to step 16.
Yes: Return to the procedure that sent you here.
16. Does the procedure that sent you here instruct you to remove the ac power from the expansion unit?
No: Return to the procedure that sent you here.
Yes: Go to step 17.
17. Is this an expansion unit with ac power cords connected from this unit's ac input/charger to an
SPCN-controlled expansion unit (for example, a 5088 expansion I/O unit)?
No: This expansion unit can be serviced without affecting an SPCN controlled expansion unit.
Return to the procedure that sent you here.
Yes: Servicing this expansion unit may affect an SPCN-controlled expansion unit that is receiving
ac power from this expansion unit. Go to step 18.
18. You may be able to maintain ac power to the expansion unit that is receiving ac power from this
expansion unit and remove power from this expansion unit so that you can service it. The following
steps will help you to determine what you can do. Were you directed to this procedure as part of a
procedure to exchange the ac input/charger, any of the device boards, or the power board?
No: You can maintain ac power to the expansion unit receiving ac power from this expansion
unit while you are servicing this expansion unit. When the expansion unit is powered off, open
the rear cover and trace the ac jumper cords from the three power supplies to the ac input
charger. Then disconnect them at the ac charger. Power is now removed from the components
that you will be working with or near. Return to the procedure that sent you here.
Yes: You must search for an alternate ac power source for the expansion unit receiving ac power
from this expansion unit. Go to step 19.
19. Can you find an alternate ac power source for the expansion unit that is receiving ac power from
this expansion unit?
No: You must power off the system to service this expansion unit. See Powering on and
powering off a system for instructions on powering off the system, then return to the procedure
that sent you here.
Common service procedures
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