Epson Progression U12 - Manual (Page 22)

3. To turn on the computer, press the power button located on
the right side of the front panel, as shown below.
button
power
indicator
hard disk
access light
The power indicator below the button lights up. After a few
seconds, the computer displays a count of its system memory,
and then performs its power-on diagnostics. This is a series of
checks the computer runs each time you turn it on to make sure
everything is working correctly. (If necessary, use the controls
on your monitor to adjust the screen display.)
Note
If you or your dealer has made a major change to your
system, such as adding a disk drive, you may need to wait a
few minutes for your computer to complete power-on
diagnostics the first time you turn it on.
When the system has successfully completed its diagnostics,
you see the following prompt:
Using Your Computer 1-3