comptia a+ customer lcd panel supplier

- So this, my friends, what I have in front of me, is an actual LCD monitor, I just took off the case, because in this episode I want to talk about some of the parts that are really, really important to us techs on the inside of LCD monitors. So let me go ahead and let"s start with probably the most important part there is right here. And this is a big guy right here. This is the actual LCD screen itself. Now, if we take a look, let me zoom in on this, there are millions of tiny little wires coming into this LCD screen with a few controller functions right here. So, this incredibly fragile piece contains gazillions, over a million, of these little picture elements in here. Now, because there"s no power, theoretically, you can"t see through an LCD when there"s no power, however, no LCD is perfect, so you can probably see me a little bit, I can see the camera a little bit. Alright, so this is the working part of any monitor. So let me just set this off to the side for a moment, because there"s more. So let"s look down here at this very bright, very white piece right here. What you"re actually looking at, they"re a little bit taped down so it"s tricky to see, but underneath here, and also way down at the bottom, are these big, long fluorescent tubes. They"re CCFLs. All of this white is basically a reflector, because we want the light to be as even as possible across the monitor so you don"t have dark and bright spots on the monitor itself. So, those are where the CCFLs live. Now, what"s interesting, if I can do this without losing a finger, is underneath here. Eh, you know what, let"s flip the whole thing over first. Here"s the power connection, this is where the monitor gets its electricity, and over here are inputs that are going to come from video cards from my system itself. Okay, now let"s go back in this guy a little bit. So, first of all, here"s the power over here, so what you have in here is a standard AC to DC power supply just like you"d see at a desktop system, although much, much smaller. This is designed to give us the DC power that our circuitry needs to run. However, there"s a problem, and the problem is, especially with the old school CCFLs, these CCFLs are fluorescent lights, and fluorescent lights need AC power. So what you would do is you would take your DC power and then have to convert it back into AC through what were known as inverters. Now, with these LED panels we see today, we don"t see the inverters anymore, you"re only going to have inverters if you have CCFLs. Okay, now coming back over here, this is the actual inputs from our video card itself, and these are different types of technologies, of connectors, we cover those in other episodes, we have some logic circuitry here, and this guy right here is the primary connection to the LCD panel itself. So, when you"re working with an LCD panel, couple things I want to make sure you understand. Number one, you"re going to have a panel of course, number two, you"re going to have a separate backlight unit. If you"re using CCFLs, and there"s plenty of monitors that still do, you are going to have inverters that take the DC power that was just converted from AC, yeah it was, and turns it back into AC to run the CCFLs. On top of that, we"re going to have our connectors, our inputs from our data connection, and of course, a big power connection as well. (jazzy guitar music)

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.

4. TFT LCDs, also known as "active matrix", were developed as a variant of LCD. TFT LCDs improved the color, contrast and response times of passive matrix LCDs. FT LCD stands for "Thin Film Transistor" and "Liquid Crystal Display".

5. The two most common types of TFT LCDs are IPS TFT LCD and TN TFT LCD. TN generally has a faster response time, which provides better entertainment experiences for watching sports or gaming, but IPS was designed to solve TN display flaws, such as a poor viewing angle and low-quality color reproduction.

6. LCD display can"t be viewed by itself. It requires back lighting, just like your digital watch requires a back light to view the time. At present, there are two main methods of backlighting in LCD flat-panels: Cold-Cathode Fluorescent Lamp (CCFL) and LED (light-emitting diode). LCD with CCFL back lighting were widely used in TVs and computer monitors. However, they are becoming obsolete these days. LCD with LED back lighting is widely used in TVs and computer monitors. Now a days. LED back lighting is most popular as it requires less power, and lasts longer. Note that the back lighting technologies should not be confused with LCD display technologies. The popular term LED TV is a bit misleading as it is actually an LCD TV, but with LED back lighting instead of CCFL.

7. Plasma display is entirely a different technology when compared with LCD. In plasma display each pixel on the screen is illuminated by a tiny bit of plasma or charged gas, somewhat like a tiny neon light. Plasma displays offer high refresh times, better viewing angles and color schemes when compared with LCD displays. However, they consume more power, and bulkier.

1. TN (Twisted Nematic):The advantages of these panels are low manufacturing cost and a relatively high level of responsiveness; the pixels change their state quickly which helps make moving images appear smoother. Some Twisted Nematic displays have double the usual refresh rate (120Hz instead of 60Hz) allowing them to take advantage of "active 3D shutter" technologies and allowing them to display twice as much information every second for a smoother gaming experience. Even 144Hz refresh rates have become possible using this technology.

2. VA panels (Vertical Alignment panels):These panels are more like TN panels, the main advantage is its efficiency at blocking light from the backlight when it"s not wanted. This gives deeper blacks and higher contrast ratios of around 2000:1 - 5000:1 Another key advantage of VA is the improved viewing angles and colour reproduction compared to TN. The main disadvantage is its slow responsiveness.

3. IPS and PLS: IPS is short for In-Plane Switching is a technology developed chiefly by LG Display, PLS (Plane to Line Switching) technology by Samsung and AHVA by AUO. These are sometimes simply referred to collectively as "IPS-type" panels. The main advantage is their superior colour accuracy, consistency and viewing angles when compared to the other LCD technologies. Usually, you can get contrast ratios of 1:1000 on these panels.

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CompTIA A+ is the industry standard when it comes to being recognized as a competent computer support technician. For CompTIA A+ certification training, you need to have basic knowledge of not only installing computer hardware and software, but also to be able to identify, diagnose, and resolve computer-related issues.

This part of our CompTIA A+ online training and prep series focuses on display devices, and how to install them in computers. Here is a step-by-step process:

CompTIA A+ classes online cover different types of display devices and it is essential for you to know the specifics of the display device that you are dealing with. The most common display devices include

LCDs:Liquid Crystal Display (LCD) is the most common type of display device used today. LCDs provide display when a backlight throws light on the liquid crystals which are filtered through polarizing filters. These display devices have faster response times, especially the Twisted Nematic types, as they have higher refresh rates.

LEDs:Light Emitting Diodes (LEDs) is the leading display technology that comes with slightly curved or flat panel displays. Unlike LCDs, they use LEDs for back-lighting purposes and require much lesser power, making them environmentally friendly.

OLEDs:Organic Light Emitting Diodes (OLEDs) don’t utilize the polarization mechanism for showing a picture. Instead, this technology lights up each pixel on the screen, which is based on the voltage it receives and molecules in question. They also consume less power as compared to LCDs.

CRT Monitors:These monitors use the analog signaling method for the delivering picture onto the screen through a fluorescent tube and electrons passing in a cathode ray tube. They are large in size and deliver a low resolution, compromising on the quality of the display.

Once you have identified the display device, the next step is to understand the cables and connectors used in connecting the display device with the computer.

When you unbox a new monitor, you’ll see that there are several parts, cables, and connectors in front of you. The first one would be the display device itself. You will have two types of cables. The first would be the power lead, also called the trade as a kettle lead, mainly because of how it looks. It has 3-pin female plug on one end, which goes into the CPU and the other end goes into the monitor. The purpose of this connector cable is to supply power to the monitor. The other type will be the ‘display’ cable that is attached to the monitor and serves the purpose of carrying display signals from the CPU to the monitor.

Depending on the type of display device you have at hand, there are likely to be three or four options available for you to choose from. It is essential that for CompTIA A+ certification training, you must know about the different types of display connector cables. Here is how you can identify and use them:

DVI:Digital Video Interface (DVI) is one of the most commonly used cables for monitor-computer connection. These cables are easily recognizable because they have white ends. Monitors, with screen size 30 and 27 inches, require special DVI cables known as a Dual-Link DVI cable. Using this cable is easy as all you have to do is plug one end into the computer and the other in the computer by identifying the shapes of the pins and ports.

Display Port:It is one of the latest video connectors and should be the preferred choice for connecting monitor with the computer. The Display Port is generally part of graphics cards that have a full-size port, but there are also others with the Mini-Display Port. It is easy to connect the monitor with your computer with this type of cable, as all you have to do is plug the larger end into the monitor and the other end into your PC. For Apple computers with the Thunderbolt connection, the Mini-Display Port is the right choice.

HDMI:The High-Definition Multimedia Interface (HDMI) cable, which is commonly found on TVs, are not the standard connection cables for monitors, but are sometimes available with laptops. It is likely that your laptop may have HDMI, while the monitor that you want to connect with the laptop has DVI or Display Port. In such a case, you can install adaptors that enable you to connect HDMI with other connections.

VGA: VGA or D-Sib analog connector is among the old types of connectors that you may find with smaller model monitors. They generally comprise of a 15-pin connector, but with display devices packed with enhanced features for clearer, high-res pictures, VGA cables may not be a good option.

Once you have connected your display device with the computer, plug in and turn on the power socket. It might take a few seconds for the monitor to show the display from the computer. If it is not properly connected, you may see a power saver display. Check your connections to ensure that the monitor is properly connected to your computer.

Once the picture comes on your screen, check the resolution, size of the display, colors, brightness, and sharpness of the display. If they are not as per your preferences, you can always change them manually directly from the monitor itself. Your computer should have the right video drivers installed automatically after the monitor setup. If not, you can always download the specific video drivers from the Internet by searching for the make and model of your display device.

Understanding the different types of display devices, their connectors and adaptors, and the installation procedure is the necessary part of CompTIA A+ certification training. Now that you have basic knowledge of displays and their installation procedure, you have higher chances of clearing the CompTIA exam and earning your certification.

This online instructor led training course provides the knowledge necessary to support basic computer hardware and operating systems in today’s business world.

In this course students will learn best practices in troubleshooting, networking and security across a variety of device types in order to support their organization and set the stage for their own IT careers.

StormWind’s two part CompTIA A+ course covers the hardware and software objectives students must master in order to pass the 220-1101 exam and the 220-1102 exam, both of which are required to achieve the CompTIA A+ Certification. The A+ Certification is part of specialized certification tracks for corporations such as Microsoft, Hewlett-Packard, and Cisco. Many technology companies have made CompTIA A+ certification mandatory for their service technicians.

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The main functionality of the Basic Input/Output System (BIOS) is to perform the initial hardware checks after the computer is powered on and start up the operating system.

Which of the acronyms listed below refers to a series of basic hardware diagnostic tests performed by the startup BIOS after the computer is powered on?

After replacing a modular hardware component inside computer case, the updated information about specific parameters of the new device can be stored in: (Select 2 answers)

After completing the initial diagnostics and assigning system resources, the startup BIOS program checks for information about secondary storage devices that might contain the OS. The list of devices and the order in which they should be checked can be found and arranged in the CMOS setup utility, and this option is commonly referred to as:

After launching Windows Virtual PC application technician receives error message stating that the Hardware-Assisted Virtualization (HAV) feature is not enabled on the computer. Which of the following steps might help in fixing this problem?

While trying to enable the entire drive encryption feature in Windows technician receives the following error message: "A compatible Trusted Platform Module (TPM) Security Device must be present on this computer, but a TPM was not found". Knowing that the system has a TPM chip installed, which of the following steps might help in solving this problem?

A computer supporting LoJack technology has two main components installed: an Application Agent residing in the operating system which sends tracking signals to the monitoring center allowing the law enforcement to locate and recover stolen device, and Persistence Module which restores the Application Agent and allows it to survive operating system re-installation or hard drive format. The highest level of security offered by LoJack can be achieved when Persistence Module resides in:

Chassis intrusion detection is an option that can be enabled/disabled in the BIOS setup utility (if a BIOS comes equipped with this feature). Coupled with a hardware sensor mounted inside the computer case, this functionality can be used to check if the case was opened and display a notification alert during next boot.

A standardized specification of a motherboard (including its dimensions, supported power supply types, and layout of components) is known as the motherboard"s:

Which of the answers listed below refers to a VIA-proprietary low-power consumption SFF type motherboard known for industrial and embedded PC applications?

Low Profile Extended (LPX) and New Low profile eXtended (NLX) are motherboard form factors known for the usage of a riser card (daughterboard) inserted into a slot near the edge of the board. The main advantage of this type of design is that expansion cards that plug into a riser card on the LPX/NLX motherboard are parallel with the board which saves space and allows for a smaller system case.

We rely on display devices as the primary output from our computers. In this video, you’ll learn about LCD displays, plasma technology, digital projectors, OLED displays, and more.

If you’re watching television, or looking at a computer screen right now, then you’re probably looking at an LCD display. LCD stands for Liquid Crystal Display, where light is shining from a back light through liquid crystals and ultimately a colored filter to be able to show you this information on the screen.

LCD displays work at the molecular level, where the liquid crystals are being twisted so that they will shine light through polarizing filters. It’s something that occurs very quickly, and on the screen we simply see moving images. There’s a lot of activity that’s happening on the inside of your LCD display. To be able to see light through these liquid crystals you need to be able to shine the light from the back side of it. So there’s usually some type of backlight behind the screen itself. And when the liquid crystals are twisted, that light is able to shine through.

Here’s a microscopic view of what this LCD display is doing. We have a backlight on the right side that is shining a light through the LCD monitor, and we’re able to see what’s coming through here on the left side. You’ve got these vertical and horizontal filters. So when you’re twisting this crystal molecule, it allows the light to now pass through these glass plates, and ultimately through a color filter that will finally turn into the image that we’re looking at on the screen.

You’ll generally see two different kinds of LCD technologies out there. One is the TN, or the Twisted Nematic LCD. This is a very common LCD screen that you’ll find on many different LCD displays. If you’re a gamer, you’ll like the TN LCD because you’re able to get very fast response times, down to the one or two millisecond level. This also is not using a lot of power for the TN technology.

Unfortunately, it has a very small viewing angle. If you ever look at the edge, or to the side of a TN LCD, you’ll notice that the color inverts itself. You’re able to see that the shifting of color might have a very narrow range, so you have to be right in front of the TN LCD monitor.

The other kind of LCD monitor you’ll find is the In Plane Switching, or the IPS LCD. These provide a very good representation of color. If you’re someone who’s working with graphics on your screen, this might be the monitor you want to use. These are also good for mobile devices because if you touch the screen, they don’t distort or tail the color as you’re moving your finger. But these are a bit more expensive to produce, so we tend to see more of the TN LCD on the lower end systems, and the IPS LCD’s on the higher end systems.

To be able to view the image that’s coming through the LCD, we need to have some type of light that’s behind the screen. This backlight can be one of two different technologies. One that we don’t see much of any longer, but you may see it on some older monitors, is the CCFL backlight. That stands for Code Cathode Fluorescent Lamp.

This is going to require some additional power over what is used today with an LED backlit display. It also requires a power converter because the backlight for a fluorescent lamp needs AC power, and we’re usually giving the components inside of the monitor DC power. So it has to convert that using the power inverter. This will also add a bit more thickness to the display because the fluorescent lamps need a bit more room. Because of all of these reasons, we tend to use other technologies for backlights today.

The technology we use today is using LED’s instead of fluorescent lamps. You’ll sometimes see these referred to as LED monitors. What it really is is an LED backlight LCD monitor. You’ll sometimes see the LED lights will be put around the edges of the displays, but when you have these larger monitors or televisions, you’ll see ranges like this where the LED lights are separated and put throughout the entire back of the display. This can provide some interesting capabilities, especially if you’re watching a movie that has very dynamic lighting because then the television can light and dim different parts of the screen at the same time.

A legacy display type you may still see in use is the plasma display. This is a series of very tiny cells that contain noble gas and mercury. And when you add voltage to that combination, you get UV light. That light is then sent through a colored phosphor, and so we’re able to watch a movie, or watch a sporting event, by seeing all of these tiny dots of light displayed on the screen. This gives us some very nice black colors, and we also have very fast response times on a plasma display. Because of the improvements in LCD technologies through the years and the improvements in the cost of LCD displays, we don’t tend to see plasma displays produced any longer.

If you’ve ever been in a corporate conference room, or you have your own home theater, you might be using one of these digital projectors to display information. These are often using an LCD– and we sometimes refer to these as LCD projectors– although the technology behind the scenes is not always using LCD. An important part of this technology is the ability to project this video onto a wall. And to do that, you need a very bright, and ultimately, a very hot lamp inside of these devices.

These lamps can be very expensive to replace. They could range anywhere from $35 up to over $350. Because of that, if you’re working with a digital projector, you want to be sure that you let the bulb completely cool off before turning off or unplugging this device. Whenever you turn off the lamp in these digital projectors, you’ll notice there will be a fan that continues to run, so that it can gradually cool down that lamp, and it’ll be available to use next time you turn on that projector.

OLED stands for Organic Light Emitting Diode. There’s very small diodes of organic material inside of these displays that will light up when you provide current. They’re very thin and very light. They have a flexible material that doesn’t require any glass, and you’ll notice there’s no back light with these. When you provide the current, the organic material itself is providing the light source. However, these organic materials can degrade over time, so you’ll find that the overall lifespan of an OLED display will be a bit less than that of a traditional LED display.

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CompTIA A+ is the industry standard for establishing a career in IT, and it is the foundation of an IT career. A+ candidates are better prepared to troubleshoot and problem solve a wider variety of issues, ranging from networking and operating systems to mobile devices and security.

Brought to you in partnership with Community Colleges of Spokane, a CompTIA Authorized Academy, this course provides the basic knowledge to install, configure, and support computer hardware and operating systems. Including the assembling of components based on user requirements; installing, configuring and maintaining devices, PCs, and software for end users; understanding the basics of network security/forensics; properly and safely diagnosing, resolving, and documenting common hardware and software issues; applying troubleshooting skills; providing appropriate customer support; and understanding the basics of virtualization, desktop imaging, and deployment.

Earning your A+ certification gives you an internationally recognized credential. Leading companies around the world are hiring A+ certified professionals like you.

Manage and troubleshoot client operating systems using command-line tools, built-in Windows administrative tools, and Windows Control Panel utilities.

You will receive an exam voucher for each A+ exam (220-1001 and 220-1002) at the end of the class so that you may take the exams at a later date. Additional virtual lab access is also included.

The class book meets CompTIA’s strict quality standards receive the CompTIA Approved Quality Content (CAQC) seal. CAQC training materials are reviewed by industry experts, cover all exam objectives, integrate instructional design principles as well as instructional reviews that help you judge your learning comprehension and readiness for the certification exam.

The classroom will open on Tuesday, September 6, 2022 and will be available 24 hours a day, 7 days a week.You decide when to participate and have no real-time meetings or requirements. Completion of the course is required by the end of the quarter on November 26, 2022.

This course is self-paced and mentor-led in Canvas. The instructor is available during the course to answer questions via email, phone or Zoom depending on student/instructor availability.

Registration is open through September 17, 2022.Instructions on how to access your online classroom will be sent to the email used during registration. Please allow 2-3 business days after registration to receive the classroom invitation. Registration for this course includes the e-book and exam voucher.