current from the unit, make sure that all connections to input power are
disconnected at the power input terminals or connectors.
3. Disconnect all power cords on the BladeCenter T unit from the ac power
distribution unit (PDU).
Note: After you disconnect the BladeCenter T unit from power, wait at least 5
seconds before you connect the BladeCenter T unit to power again.
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BladeCenter T Type 8267: Hardware Maintenance Manual and Troubleshooting Guide