IBM F50 RS/6000 7025 - Manual (Page 70)

To enter the graphical System Management Services instead of the Open Firmware
command line, you must press the F1 key
after the keyboard icon appears during
startup.
After the System Management Services starts, the following screen appears.
You may also press F8 here to enter the OK
>
prompt.
3-2 IBM RS/6000 7025 F50 Series User's Guide