IBM RS/6000 7043 260, Service Manual

Page: 56 / 322

DANGER
To prevent electrical shock hazard, disconnect the power cable 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 start/stop switch on the operator panel
is pressed. None of the power 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 on the operator panel is pressed, the system begins
to power on, but the operator panel power LED and/or the power supply LED do
not stay on."
Step 1520-2
1. Unplug the power cord from the system unit and the power outlet.
2. Check that the external power cord to the system unit has continuity.
3. Check that the power outlet has been wired correctly with the correct voltage.
4. Plug the power cord into the system unit and the power outlet.
Did you find a problem?
NO Go to “Step 1520-3” on page 2-25.
YES Correct the problem. Go to
"
MAP 410: Repair Checkout
"
in the IBM
RS/6000 Diagnostic Information for Multiple Bus Systems.
2-24
Service Guide