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IBM ThinkPad 390

IBM ThinkPad 390
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Identifying the Hardware Features
Rear View of the Computer
1
2
3
4
5
6
7
8
9
10
14
13
12
11
(1) The battery pack is a built-in power source for the computer.
(2)
The infrared port allows the computer to communicate with
other devices that have infrared data-transfer capability.
(3)
The power switch turns the computer on and off.
Note: If you power off the computer, wait at least 5 seconds
before you power it on again.
(4) The S-video jack is where you connect a television or external
display devices with an S-video in-out cable.
(5)
The universal serial bus (USB) allows you to connect any
device that conforms to the USB standard.
(6)
The power jack is where the AC Adapter cable is con-
nected.
(7)
The external-monitor connector is where you attach the
external monitor.
(8)
The serial connector is where you connect a 9–pin, serial-
device cable.
(9)
The security keyhole is used with a mechanical lock.
(10) To remove the hard disk (11), loosen this hard disk screw.
Getting Familiar with Your Computer 5

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