Lexmark 4I3 - Manual (Page 167)

Power Switch
The power switch supplies electricity to the printer. It has two
positions: On (|) and Off (O).
P o w e r S w itc h
Notes:
1. When you turn the power On (|), a power-on test runs. For the
description of the power-on test, see “Power-On Test” on
page 3-4.
2. Always wait 10 seconds after turning the power from Off (O) to
On (|).
3. Anytime you turn the power On (|), you should verify the top of
form position before running a job. See Chapter 1, “Setting Up
the 4230 Printer” for adjusting the top of form position for your
forms device.
Warning: If you turn the power Off (O) while data is in the printer
buffer (a temporary storage area) or coming from the computer to the
printer, you will lose data.
Chapter 3. Getting to Know Your Printer 3-3