Lenovo ThinkCentre M91 - Manual (Page 17)

1 USB connector Use this connector to attach a device that requires a USB
connection, such as a keyboard, a mouse, a scanner, a
printer, or a personal digital assistant (PDA).
2 Serial port Use this port to attach an external modem, a serial
printer, or other devices that use a 9-pin serial port.
3 Ethernet connector Use this connector to attach the computer to an
Ethernet-type local area network or to a cable modem.
Important: To operate the computer within FCC limits
when it is connected to an Ethernet network, use a
Category 5 Ethernet cable.
4 eSATA connector Use this external Serial Advanced Technology Attachment
(eSATA) connector to attach an external hard disk drive.
5 Parallel port Use this port to attach a parallel printer or other devices
that use a 25-pin parallel port.
9. Connect the power cords or the power adapter to properly grounded electrical
outlets.
Turning on computer power
Turn on the monitor and other external devices first, and then turn on the computer.
When the power-on self-test (POST) is finished, the logo window closes. If your
computer has preinstalled software, the software installation program starts.
Chapter 2. Setting up your computer
13