IBM 3270 Maintenance Manual page 60

1. Plug the power cords for all work station
components into functioning, grounded power
outlets.
2. If your display has an On/Off (I/O) switch, set
the switch to On
(I).
3. Set the Power switch for the system unit (and
expansion unit, if attached) to On
(I),
and
check to see if the power supply fan is
running.
IS THE SYSTEM UNIT POWER SUPPLY
FAN RUNNING?
NO If the system unit works properly except
for the fan not running, replace the power
supply. See Section 5, "Removal,
Replacement and Adjustments."
YES
If the system unit does not work properly,
check the system unit power cord for
continuity. If the continuity is good, go to
"Undetermined Problems." on page
3-9999-1. .
October
1984
3-5-3