IBM 3270 Manual page 59

Loading the Control Program from
Your Fixed Disk
1. Make sure that your diskette drive is empty
and the lever is up.
2. Turn your system unit off.
3. If you have a color display, turn it on.
4. If you have an expansion unit, turn it on.
5. Turn your system unit on.
That's all there is to it. The next thing you will
see is the Power-On Self Test run again.
Continue with the next section, "Watching the
Power-On Self Test (POST)" on page 1-51.
1-50 Book 2 - Setting Up and Learning