Epson 486SX - Manual (Page 33)

4. To turn on the computer, press the power button located on
the right side of the front panel, as shown below.
power
The power indicator below the button lights up. After a few
seconds, the computer starts to perform a diagnostic self test-
a series of checks it completes each time you turn it on to make
sure everything is working correctly.
Note
If you or your dealer have 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 self test, you
see a prompt to insert a system diskette. (Do not insert a
diskette at this point.)
If necessary, use the controls on your monitor to adjust the
brightness and contrast until characters on the screen are clear
and at a comfortable level of intensity. If your monitor has
horizontal and vertical hold controls, you may need to use
them to stabilize the display.
Setting Up Your System 1-15