IBM RS/6000 H50, Installation And Service Manual

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Step 1520-1
You may be directed to this MAP for several reasons:
1. OK is displayed on the operator panel, but there is no indication of activity when
the start/stop switch is pressed. None of the LEDs light and none of the fans,
including the fan in the power supply, start to turn.
Go to “Step 1520-2.”
2. When the start/stop switch is pressed, the system begins to power on, but the
power light on the operator panel does not stay on.
Go to “Step 1520-5” on page 2-14.
3. An SRN referenced in the Diagnostic Information for Multiple Bus Systems listed
MAP 1520 in the "Actions/Descriptions" column for a Voltage Sensor out of
range.
Go to “Step 1520-8” on page 2-17.
4. The power light on the operator panel is not flashing, or the power light on the
operator panel is flashing AND the operator panel is blank.
Go to “Step 1520-3” on page 2-13.
Step 1520-2
1. Turn the power off.
2. Check that the power cables to the system unit have continuity.
3. Check that the power outlet has been wired correctly with the correct voltage.
4. Check that the power cables are plugged into both the system unit and the
power outlet.
Did you find a problem?
NO Go to “Step 1520-5” on page 2-14.
YES Correct the problem. Go to "MAP 410: Repair Checkout" in the Diagnostic
Information for Multiple Bus Systems.
2-12
RS/6000 Enterprise Server Model H50 Installation and Service Guide