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CompTIA A+_Exam Cram-David L. Prowse > mobileDevices_Chapter 2. Laptops, Part 2 > Flashcards

mobileDevices_Chapter 2. Laptops, Part 2 Flashcards

1
Q

A laptop might use one of a few types of displays, what are they

A

LCD, LED, and OLED.

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2
Q

LCD

A

LCD: The liquid-crystal display (LCD)

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3
Q

LCD: The liquid-crystal display (LCD)
made of
how connects

A

consists of two sheets of
polarizing material surrounding a layer of liquid
crystal solution

connects to the motherboard
by way of a flex ribbon cable, or an all-in one
power/signal cable, and gets its power from an
inverter board.

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4
Q

active-matrix displays,

A 
active-matrix displays,
meaning they have multiple transistors for each
pixel.
Most of today’s LCD screens are
thin-film transistor (TFT)
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5
Q

TFT

A

thin-film transistor

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6
Q

where are transistors located in active-matrix displays,

A

These transistors are contained within a
flexible material and are located directly behind
the liquid crystal material.

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7
Q

LCDs
generate a small amount of heat, and cause little
in the way of interference and emissions.
Downside -But they use what kind of bulb that what?

A 
use more electricity than newer
types of displays because they utilize a highpowered bulb; quite often, a cold cathode
fluorescent lamp (CCFL).
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8
Q

CCFL

A 
cold cathode
fluorescent lamp (CCFL)
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9
Q

LED

A

Light-emitting-diode (LED)

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10
Q

Light-emitting-diode (LED) monitors

utilize ? and what colors?

A

utilize two-terminal electronic components
known as diodes to display images. These diodes
are red, green, and blue (RGB)

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11
Q

RGB

A

red, green, and blue

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12
Q

Light-emitting-diode (LED) monitors

Benefit/difference between LCD

A 
use less power than traditional LCDs
Backlight- 
LCD monitors use a
CCFL as the illumination source
LED monitors
use light-emitting diodes, which release photons
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13
Q

hybrid designs of LCD and LED

A

hybrid designs known as
LED-backlit LCDs.
In that case, we are not using a CCFL, and
instead utilize diodes but with an LCD screen.

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14
Q

LED monitors
use light-emitting diodes, which release photons;
this process is known as

A

electroluminescence

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15
Q

OLED

A

OLED stands for

organic light-emitting diodes.

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16
Q

OLED organic light-emitting diodes. Technology ?

A

The technology uses an organic
compound to emit light in response to an electric
current. OLED displays have the best black
levels

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17
Q

why would you want LED over OLED

A

might opt for LED if you are more
concerned with brightness and some other
specifications.

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18
Q

Inverter in a laptop

A

converts direct current (DC)
that comes from the motherboard into alternating
current (AC)

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19
Q

What display screens need an inverter to work? why and other options dont why?

A

LCD needs inverter-The backlight is a bulb; for example, a CCFL.

LEDs (and OLEDs)
don’t need an inverter—they are DC only by design—
and don’t use a CCFL or similar lamp.

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20
Q

laptop
Minor issues such as
intermittent lines on the screen suggest that the

A

display cable needs to be reconnected or replaced.

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21
Q

LCD display failures can be broken

down into a couple categories:

A

a damaged inverter or a

worn out backlight.

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22
Q

LCD is usually lit by a CCFL (basically a bulb); it is that

LCD backlight which requires?

A

AC power.

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23
Q

inverter can fail because it

A

runs at high voltage, and possibly at high

temperatures, it is prone to failure.

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24
Q

If the inverter fails,
the display will go dark
What is an easy option to use the laptop

A

an external monitor

should work properly

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25
Q

Display goes dark on LCD screen what are first couple options to look for

A

If the inverter fails, the display will go dark; however, an external monitor should work properly

Another possibility is that the backlight has failed
verify if it is an inverter/backlight issue by shining a flashlight directly
at the screen (best in a dark room and make out the operating system)

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26
Q

laptop display

The inverter often has two connectors:

A

one for the high-voltage connection that leads to the power
source

one for a cable that connects to the display.

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27
Q

What should you do before ever working with inverter on laptop?

A

Be sure to turn off and unplug the laptop
and remove the battery before removing an inverter.

Warning! The inverter should not be handled if the
laptop is on!

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28
Q

dimmer screen than before, or a
reddish/pinkish hue to the screen, or maybe a loss of
color.
Indicate what?

A

laptop’s backlight

usually lasts a long time.

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29
Q

Digitizers and Touchscreens

A

A touchscreen—also known as a digitizer screen—is a

screen that allows for tapping or writing on the screen.

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30
Q

A stylus

A

A stylus is a
writing tool, usually a thin plastic “pen” type of device
used to take the place of a mouse; it enables you to tap
and “write” on the digitizer with great accuracy

31
Q

How does a digitizer work?

A

converts tapped or written impulses (analog) on the
screen into instructions (digital) for the operating
system to follow.

32
Q

How to replace (steps) Webcam

important

A

First, employ antistatic measures.

remove the bezel from the display

Often, it is just connected with a small plug,
and no screws or attachment of any kind.

carefully disconnect it with your shim or other thin
prying tool (non-metal), and place it in an antistatic
bag, and label it for later use
Hold on to any tape or
sticky material that keeps the webcam in place.

Next,
replace it with an identical part. 
plug is
often delicate. Use, or re-use tape to fasten the
webcam in the right spot (if necessary).

test the
webcam’s video and audio

33
Q

NO answer just read through

Some people use tape to cover the webcam for security
or privacy purposes, but depending on the policies of
your organization, this might not be enough, and you
will have to remove it altogether. Some companies
offer filler items to fill the gap where the camera lens
normally goes.
A laptop might have a function key that can disable the
webcam. It can also be disabled in the operating
system, so be sure to check those before replacing the
webcam.
The microphone on a laptop is often part of the
webcam module, for example to the left of the lens. So,
removing the webcam module removes the
microphone. The microphone could also be disabled in
the operating system. For example, in Windows you
would do this in the Recording tab of the Sound dialog
box. As mentioned, some people use tape to cover the
webcam, and the microphone openings as well;
however, depending on the type of tape, it might
muffle the recorded sound, but not eliminate it. Once
again, for security purposes, it is better to disable the
webcam altogether, or remove it.

A

No answer just read through

Some people use tape to cover the webcam for security
or privacy purposes, but depending on the policies of
your organization, this might not be enough, and you
will have to remove it altogether. Some companies
offer filler items to fill the gap where the camera lens
normally goes.
A laptop might have a function key that can disable the
webcam. It can also be disabled in the operating
system, so be sure to check those before replacing the
webcam.
The microphone on a laptop is often part of the
webcam module, for example to the left of the lens. So,
removing the webcam module removes the
microphone. The microphone could also be disabled in
the operating system. For example, in Windows you
would do this in the Recording tab of the Sound dialog
box. As mentioned, some people use tape to cover the
webcam, and the microphone openings as well;
however, depending on the type of tape, it might
muffle the recorded sound, but not eliminate it. Once
again, for security purposes, it is better to disable the
webcam altogether, or remove it.

34
Q

How to disable web cam

A

tape to cover the webcam

remove it altogether. (Some companies
offer filler items to fill the gap where the camera lens
normally goes.)

function key that can disable it

external USBbased webcams to achieve better security

35
Q

Wi-Fi antennas are used to connect to a wireless

network, also known as?

A

wireless local area network

WLAN

36
Q

laptop

Wi-Fi antennas can be found

A

inside the

laptop as well as externally.

37
Q

If the antenna is inside the

laptop, it will usually be some type of module, like?

A 
an M.2 card (as shown in Figure 2.1), or a PCI Express
Mini Card (also known as a Mini PCIe card)
38
Q

what is this

A 
A typical internal Wi-Fi module using the
M.2 form factor
39
Q

What is this

A

Mini PCIe cards

with antenna adapter

40
Q

M.2-
based cards
pins and standards?

A

67 pins and might use the 2230
standard (22 x 30 mm) or the 1216 standard (12 x 16
mm), among others.

41
Q

Full size Mini PCIe cards and subgroup

A

Full size Mini PCIe cards are 30 x 50.95 mm and use a
-52-pin edge connector. There are
also half mini cards that are the same width, but are
26.8 mm long. This is also known as “half height”,
though this name isn’t quite accurate. Both of these are
about half the width of the older Mini PCI standard.

42
Q

when installing an M.2 or Mini PCIe card,

A

contacts can be easily damaged
Place even pressure on both sides and press the card into the slot
evenly

If a Wi-Fi antenna cable already exists in
the laptop, re-use it by connecting the wire ends to the
contacts on the card
usually there is two, one for WiFi, and one for Bluetooth (BT).

43
Q

When using external Wi-Fi/RJ45 (ethernet) adapters

What should you consider?

A

USB 3.0 or higher (blue ports or

better).

44
Q

Wi-Fi transmissions rely on the?

Which rely on?

A

IEEE 802.11 standards
including 802.11ac, n, g, and b (going from fastest to
slowest).

45
Q

IEEE ? what does it include?

A

Institute of Electrical and Electronics Engineers.
IEEE 802.11 standards
including 802.11ac, n, g, and b (going from fastest to
slowest).
WIFI

46
Q

Every Wi-Fi adapter has its own unique?

A

media access

control (MAC) address, also known as a MAC ID

47
Q

MAC

A

media access control (MAC) address, also known as a MAC ID

48
Q

Where can you find media access
control (MAC) address, also known as a MAC ID
wifi adapter

A

usually printed on a sticker on
the Wi-Fi adapter, and it is programmed into the ROM
of the adapter.

49
Q

What does MAC ID do for wifi adapter?

A

differentiates the Wi-Fi adapter from
all other network adapters on your network and
around the world

50
Q

How is MAC ID written?

A

MAC address is a 48-bit number,
described in the hexadecimal numbering system. For
example: 68-05-CA-2D-A4-B3.

51
Q

How is MAC ID referred to as in windows?

A

physical address
The number is also
referred to as a physical address in the Windows
command-line.

52
Q

special function keys on a laptop can control ?

A 
Wi-Fi,
Bluetooth, 
GPS
enabling/disabling the touchpad;
and adjusting the brightness and volume
53
Q

Docking stations and port replicators allow us?

A

to turn a laptop into more of a workstation,

adding monitors, keyboards and mice, as well as network connectivity and storage capabilities

54
Q

A user might have a need for a

more adjustable laptop what could you suggest?

A

one that has a

screen that rotates, flips over, or is removable.

55
Q

Fn on a laptop

A

The Fn key (Function key)

56
Q

The Fn key (Function key) does what

A

designed to activate

secondary or special functions of other keys.

57
Q

keys Involved with special functions?

A

But all this is up to the manufacturer and any key can
be given a secondary function.

Sometimes a laptop will have separate buttons near the power button or elsewhere
that aren’t considered part of the regular function keys. These might be called special
keys, special buttons, hot buttons, hotkeys, or corner keys

58
Q

sometimes If available, press the Num Lock key enable/disable

A

the numeric keypad on a laptop. If the Num Lock

indicator light is on, then the numeric key is enabled.

59
Q

Most laptops have the capability of sending video
signals to an external monitor. Some people refer to
this technology as?

A

screen switching and/or extending

the display.

60
Q

screen switching and/or extending
the display. will require what connection
Ideally!

A

HDMI or DisplayPort Ideally

61
Q

when you are using a projector as the second display.

Sometimes……(basic troubleshoot)

A

the projector might need time to warm up

might need to be configured via its on-screen
display (OSD).

You might also need a video adapter if
your laptop and projector’s ports don’t match up.
Identify the projector’s ports, and locate the projector’s
documentation for more details.

62
Q

laptop connecting

OSD

A

on-screen

display (OSD).

63
Q

If nothing shows up on an external display, then

A

try
cycling through the different display modes by using
the Fn key and the appropriate special function key.

64
Q

Docking Stations

A

The docking station expands the laptop so that it can

behave more like a desktop computer.

65
Q

some laptops can hot dock, meaning

A

they can connect to the docking station while powered on.

66
Q

The docking station can

A

recharges the laptop’s battery, and possibly a second battery

Has connections for
-video, audio, networking, and expansion cards.
might even have an
-optical disc drive,
-additional hard drive, and additional display and USB
ports

67
Q

Alternative to docking station

A

port replicator,

68
Q

port replicator,

A

Used with laptop-alternative to docking station

has only ports (for example, video, sound, network, and so on).
Sometimes these are just referred to as docking
stations as well.

69
Q

difference between

docking station and port replicator

A

A laptop is placed or “docked” into a docking station.

port replicator is connected to the laptop simply to provide additional ports.

70
Q

Rotating and Removable Screens downside

A

the probability of failure increases.

In fact, any moving or connecting parts in
any device will increase the chance of failure

71
Q

How to educate user with rotating and removable screen

A

educate users on how to gently connect displays, and how to work with them properly to avoid these problems in the future.

72
Q

way to physically secure a laptop

A

Securing Laptops with Cable Locks

73
Q

How to use laptop security lock/cable

A

laptops come with a security slot

to be used with cable locks; the tubular lock is inserted into the slot and turned 90 degrees to lock it or unlock it.

CompTIA A+_Exam Cram-David L. Prowse (5 decks)

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