Use the Power button

If you cannot use option 3 (Power off the system immediately) or option 4 (Power off the system immediately and then power on) on the Power On and Off Tasks (POWER™) menu to stop the system, you can turn off the system using the Power button when the mode is set to Manual.

Note: Using the Power button to turn off the system might cause results that cannot be predicted in your data files, and the next initial program load (IPL) will take longer to complete. Using the Power button to turn off the system will turn off all logical partitions.

Make sure that there are no tapes in the tape units or diskettes in the diskette units, and that the mode is set to Manual.

Do not turn the modem on or off when the system is turned off and is made ready for remote IPL. Otherwise, the system might start unexpectedly, although it turns itself off in a few minutes.

To turn off the system using the Power button, perform the following steps:

On the control panel, press the Power button. The Function/Data display blinks with 0 (the international turn off symbol).
Press the Power button again. The Power On light blinks as the system is being turned off. When the system is completely turned off, the light goes off.
Note: If the system does not turn the power off within 30 minutes, wait for the System Attention light to come on. When the System Attention light comes on, go to Service and support, and Troubleshooting and follow the steps necessary to solve the problem.