CompTIA® A+™ Core
1 Exam Notes :Types And Features Of Display Devices &
Connector Types And Associated Cables & Others
1.10 Given a scenario, evaluate
types and features of display devices
1. When you are installing a different SVGA monitor,
it is unlikely that the new monitor has the same capabilities
as the old one. As a result, the image on the screen
may not be readable. In such instances, change the video
resolution to Standard VGA before installing the new
monitor. You can change the resolution appropriately
after the image on the screen is readable with the new
monitor. It may also be necessary to load appropriate
device driver, if you are installing a different display
adapter.
2. If the LCD screen changes colors, like turning
green and then blue or red, it is likely that you have
a cable problem. First check the monitor cable whether
it is loose. Then try to twist the monitor and see if
there is any problem. If the problem occurs, it may
be necessary to replace the LCD monitor cable.
3. You need more brightness when a projector is used
in environment where there is plenty of light in the
room. Higher lumens provide more brightness, but more
expensive.
1.11 Identify connector types
and associated cables
1. High-Definition Multimedia Interface (HDMI) connectors
are used to connect compatible digital items (DVD players
and conference room projectors, for example).HDMI theoretical
cable length limit is 16 feet (5 meters).
2. If you want to receive TV signals on the HTPC (Home Theater
PC), you will need a TV tuner card. These can be installed internally
in a slot or they can be external units connected with the USB port.
They also can be analog, digital, or both (although broadcast analog
TV has been discontinued in the United States since 2009). If recording
the TV content is required, the card must also be a video capture
card.
3. In cases where it is desired to watch one stream of content
while recording another stream, a card that has two tuners in it
must be used. These are called combo tuners.
4. PATA (IDE)-- Parallel advanced technology attachment (originally
called ATA and sometimes known as IDE or ATAPI) was the most dominant
desktop computer storage interface from the late 1980s until recently,
when the SATA interface took over. PATA hard drives are still being
utilized today, especially in external hard drive boxes, but they're
becoming rare. Some cheaper high-end server storage devices have
also used PATA. Like SCSI, PATA has also gone through many revisions.
The most recent version of PATA is UDMA/133 which supports a throughput
of 133 MB/s.
5. Although PATA supports two devices per connector in a master/slave
configuration, the performance penalty of sharing a PATA port is
severe and not recommended if performance is important to the user.
The 40-pin connector and cabling is also extremely wide, which is
difficult to use in a high-density environment and tends to block
proper airflow. The size of the connector also presents problems
for smaller 2.5" hard drives, which require a special shrunken connector.
6. SATA And ESATA-- Serial advanced technology attachment is
the official successor to PATA. So far, there have been two basic
versions of SATA, with SATA-150 and SATA-300. The numbers 150 and
300 represent the number of MB/s that the interfaces support. SATA
doesn't have any performance problems due to cable/port sharing,
but that's because it doesn't permit sharing at all.
SATA Connector
1.12 Install and configure various peripheral
devices
1. Key boards come with two types of connectors. They are:
a. DIN-5, DIN-5 has 5 pins and used with AT style keyboards.
b. Mini DIN-6, also known as PS/2 connector, has around port
with 6 pins, one of which being a square pin used for alignment.
2. A USB hard disk usually requires lot of power, and it is recommended
to use additional USB adapter or external power source to power
the USB hard drive. In this case, because the USB hard drive is
working on other computers, it is likely that the user’s USB is
unable to provide sufficient power to the drive. It happens primarily
if the USB port does not conform to the 2.0 standard. Upgrading
the computer with USB 2.0 card will help him use the USB hard drive.
3. When installing a third party application, ensure that the
following recommendations are fulfilled:
a. You have administrative rights to the computer
b. Get latest Windows updates
c. Disable any conflicting software; you can use MSCONFI
utility to troubleshoot the problem in XP, Vista, or Windows
7.
d. Make sure your folder names don't contain strange characters
e. Additionally, if you are installing unsigned software,
you will be prompted whether you are willing to go ahead with
the installation. You must accept to the risks to complete the
installation.
4. After installing a bar code reader, you need to scan in program
codes to configure the reader
5. You can synchronize an iOS device with home computer using
USB or Wi-Fi connectivity.
6. If the mechanical mouse pointer suddenly moving with irregular
movement/sporadic movement the main reason is dirt. If dirt has
entered the mouse, clean the dirt with IPA, or cotton wetted in
soap water.