IBM Application System/400 Service Information page 138

Powering Off and Powering On
the System
Power on
Ensure that the AC power switch on the back of
the 9401 is set to the On (I) position. Power on
the system by pressing the power button on the
control panel. The Power-on light will begin to
blink as the system is powered on. The light will
stop blinking and stay on when power-on is com-
plete.
Power off
The recommended method to power off the 9401
is through the Power menu or by use of the
PWRDWNSYS command. If you cannot use
these methods, you can power off the 9401 by
using the control panel Power button.
Note: If PC Support is running on the system
console, a delayed power off using the
PWRDWNSYS command is required. Any PC
Support applications that are running must be
stopped before the delayed power off is complete.
Warning: Using the control panel Power button
to power off the 9401 system may cause unpre-
dictable results in the data files, and the next IPL
will take longer to complete.
1. Open the front cover of the 9401.
2. The 9401 must be in manual (M) mode to
power off. To select manual mode see
"Selecting IPL and Mode."
3. On the control panel press the Power button.
4. The Power On light will begin to blink as the
system is powered off. The light will stop
blinking and stay off when power off is com-
plete.
5-2
AS/400 9401 Service Information
Selecting IPL and Mode
To display the last selected IPL type and mode do
the following:
1. Press either the Up or Down button until
Function 01 is shown in the Function/Data
display.
2. Press the Enter button.
3. The last selected IPL type and mode are
shown in the Function/Data display.
To change the IPL type, mode, or both, do the fol-
lowing:
Note: Function 02 has eight possible combina-
tions of IPL and mode selections. There
are four IPL selections in normal (N) mode
and four IPL selections in manual (M)
mode. Ensure you are selecting the
correct IPL type and mode.
1. Press either the Up or Down button until
Function 02 is shown in the Function/Data
display.
2. Press the Enter button.
3. The last selected I PL type and mode are
shown in the Function/Data display.
4. Press either the Up or Down button until the
combination of IPL type and mode you want
to select are displayed.
5. Press the Enter button.
6. The IPL type and mode shown in the display
have been selected.
7. To verify the IPL type and mode selection do
the following:
a. Press either the Up or Down button until
Function 01 is shown in the Function/Data
display.
b. Press the Enter button.
c. The last selected I PL type and mode are
shown in the FunctionlData display.