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PDU power

__ 1. Remove power from the 3931 by doing one of the following:

• Removing the power source

• Shutting the wall breakers

• Removing the power cords from the PDUs.

__ 2. If the system does not power off, see 3931 Service Guide, GC28-7018 to troubleshoot the problem.

BPA power

__ 1. Remove power from the 3931 by doing one of the following:

• Removing the power source

• Shutting the wall breakers

• Removing the power cords from the BPAs.

__ 2. If the system does not power off, see 3931 Service Guide, GC28-7018 to begin troubleshooting the

problem.

Chapter 1. Safety inspection ENG-5

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IBM 3931 Specifications

General