Removing The Computer Cover; Before You Begin - Dell OptiPlex 740 dcsm Schnellreferenzhandbuch

9 serial
connector

Removing the Computer Cover

CAUTION:
safety instructions in the Product Information Guide.
CAUTION:
the electrical outlet before removing the cover.

Before You Begin

NOTICE:
To avoid losing data, save and close any open files and exit any open
programs before you turn off your computer.
1 Shut down the operating system:
Save and close any open files, exit any open programs, click the Start
a
button, and then click Shut Down.
In the Shut Down window, select the Shut Down option from the
b
drop-menu, and then click OK.
The computer turns off after the operating system shutdown process
finishes.
2 Ensure that the computer and any attached devices are turned off. If your
computer and attached devices did not automatically turn off when you
shut down your operating system, turn them off now.
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from
potential damage and to help ensure your own personal safety.
CAUTION:
safety instructions in the Product Information Guide.
32
Quick Reference Guide
Connect a serial device, such as a handheld device, to the serial
port. The default designations are COM1 for serial connector 1
and COM2 for serial connector 2.
NOTE:
There is only a serial connector 2 if the optional PS2/serial
adapter is used.
For more information, see "System Setup Program" in your
online User's Guide for instructions.
Before you begin any of the procedures in this section, follow the
To guard against electrical shock, always unplug your computer from
Before you begin any of the procedures in this section, follow the