IBM B50 Did you find a problem?, Diagnostics Information for Multiple Bus Systems, 2-13, Step

DANGER

To prevent electrical shock hazard, disconnect the power cord from the electrical outlet before relocating the system.

Step 1520-1

You may be directed to this MAP for several reasons:

1.There is no indication of activity when the power button on the operator panel is pressed. The power LED does not come on and none of the fans, including the fan in the power supply, start to turn.

Go to “Step 1520-2.”

2.When the power button on the operator panel is pressed, the system begins to power on, but the power does not stay on.

Go to “Step 1520-2.”

Step 1520-2

1.Unplug the power cord from the Power Distribution Unit (PDU)/Power Distribution Bus (PDB) and the power outlet.

2.Unplug the power cord from the PDU/PDB and the power supply.

3.Check that the power cord from the power outlet to the PDU/PDB has continuity.

4.Check that the power cord from the PDU/PDB to the power supply has continuity.

5.Check that the power outlet has been wired correctly with the correct voltage.

6.Plug the power cord into the PDU/PDB and the power supply.

7.Plug the power cord into the PDU/PDB and the power outlet.

Did you find a problem?

NO	Go to “Step 1520-3” on page 2-14.
YES	Correct the problem. Go to"MAP 0410: Repair Checkout	" in the
	Diagnostics Information for Multiple Bus Systems.

Chapter 2. Maintenance Analysis Procedures (MAPs) 2-13