IBM RS/6000 7043 260, Service Manual

Page: 58 / 322

Step 1520-4
The power supply is working normally.
1. Unplug the power cord from the system unit.
2. Press and hold the start/stop switch on the operator panel for a few seconds to
discharge the power supply.
3. Plug the power connectors (P1, P2, P3, P4, P5 and P6) into the power supply.
4. Plug the power cord into the system unit.
If a cooling fan won't turn, the system will try to power up and then off when the
start/stop switch on the operator panel is pressed (but not when the switch on the
power supply is pressed and held).
While holding the power supply switch do all the cooling fans turn?
NO Replace the faulty cooling fan. Go to
"
MAP 410: Repair Checkout
"
in the
IBM RS/6000 Diagnostic Information for Multiple Bus Systems.
YES Exchange the operator panel electronics assembly. Go to “Step 1520-5”
on page 2-27.
2-26
Service Guide