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New model computers are introduced in Oro Valley Arizona daily. You may love a certain brand and purchase it. But if you forget or be careless about repairing and maintaining them then you will face various technical problems.

Computers are machines made of electronic parts. It’s a machine which includes both software and hardware. If there isn’t proper maintenance your computer will fail to operate and you may end up with data loss and other critical errors.

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These days, many IT businesses are incorporating laptops & LCD Monitor desktops into their expertise infrastructure. These lovely & handy laptops allow you to do your work at your own ease even when you are not in your work-place. They attach flexibility and anyplace, anytime access to your business. Moreover, these laptop computers are absolutely useful while traveling. You can be in touch with your business associates anytime as the requirement may be. Not only in work-places, these laptops are fast becoming popular among educational institutions & students. An ever increasing number of schools are now endorsing the use of laptop computers. But as the saying goes every coin has 2 sides even here there is another side . If anything goes wrong with their functioning, it is exceedingly difficult to get them repaired quickly and at reasonable rates. And in this age no business would want to suffer for lack of dependable laptop repair service centers. We generally are constantly vexed by the question "How to fix a damaged laptop?", then please proceed & read this article in order to get most solutions to your laptop repair related problems. Where can we find the genuine parts? A good place to start is use Google and search on your part number::

That is in case we are looking for do-it-ourselves instructions about laptop or notebook repair? Here we have disassembly manuals, pictures and videos ordered by manufacturer. Which would include the likes of HP, Dell, Sony, NEC, Acer, Ricoh e.t.c.,

Another good source is to do a search on froogle as well. Failing that we can call the original manufacturer and find out the cost. Which normally is more than the market rates. Frequently experienced problems in any laptops "believe it or not" are caused by USER ERROR!

One laptop failure that is usually worth repairing is the hard drive. Laptop hard drives have a higher failure rate than desktop hard drives, assumedly because they get bounced around more. The first step to take when working on any laptop or notebook computer is to remove the battery. Even if the power button is well protected, like under the closed lid of the screen, it doesn't mean that the power might not come on due to a mechanical jolt or a short when we are working on the insides, so the best bet is to just get the battery out of there. In some ways, laptop troubleshooting is easier than PC troubleshooting. The basis is that laptops are so highly integrated that many problems you can fix on a PC require replacing the main board of a laptop, Replacing the battery is often a solution to power related problems (though costly) or you may use reconditioned batteries, but repairing the charging circuitry is beyond the average home user. While operating Technicians generally are able to perform system board level repair on laptops, there are not too many problems which they cannot diagnose. Of course, some systems may require a part or component which has over the time become obsolete and that makes some repairs more difficult and time consuming. Some common problems encountered each day are blank screens, systems that don't power on, or turn on then off, systems that cannot charge batteries, ac adapter sockets which are broken and similar problems. I would first look for a local shop that can fix my laptop. If my laptop is older and the screen has either been broken or damaged or just does not switch on it might better considering to replace the entire laptop. Replacing the L.C.D screen can be the most expensive affair of the laptop. And as a matter of fact Most of the companies like Dell, HP lose millions of dollars in replacing these LCD's or charge it on the insurance cover. Therefore it would be highly advisable to use either 3M Protection filters or Privacy filters for these screens as the surface of these screens are vulnerable to punctures, stains & damages. What these filters do is give an anti-glare coating, protect the surface from getting damaged & give you a privacy feature where-in its only the user who can see the data & not a person sitting next to him, this therefore is an added feature in this fast paced world where information security is so very critical. Also one more thing that we need to always remember is that since laptops help us carry valuable data across different places, companies & countries, we need to protect the unit without compromising on the quality of the laptop case or bag. Laptop cases are no longer simply about getting your laptop from one place to another; you can do that with a plastic grocery bag. With more people than ever daily toting their computers between the office and the home, the laptop case is now expected to mix sturdiness, protection, style-the ratio of those elements is up to you. And since with the laptop you might have to carry battery charger or other required components, its better to have removable mesh accessory pouch, removable CD/DVD sleeve that holds eight discs, a detachable mobile phone case, and a zip-down workstation. There fore in conclusion, I would like to cite that the advent of Laptop has been a blessing for us, now it is up to us as to how we actually maintain it optimally.

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Laptop Hardware Repair

The cyber-world is full of threats such as viruses, spyware, Trojans, Worms and etc. These can affect your PC and even steal your personal information. These cyber-threats can cause huge dilemmas to your PC. Always have an anti-virus guard installed. Upgrade the program and schedule regular updates. Your software’s database should be updated for a full-protection.

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The FCC standard for HDTV broadcast is having a huge impact. The amount of information to be digested can be intimidating, even for the professional. The old hardware does not become obsolete, but it will require a tuner to convert from the new signal if you get your signal from a VHF/UHF antenna. If you have cable or satellite TV, this will be taken care of by the service provider.

However, this might be a good time to upgrade your hardware. The new standard offers a much better picture. In the current world of digital projectors, LCD, LCOS, Plasma, and DLP are the four different kinds of televisions that dominate the HDTV market. Each has unique advantages over the other. Plasma and some of the LCD screens can be mounted on the wall, although surveys find that few people do mount them on the wall. DLP and LCOS and some of the LCD units are both projector technologies. Rear projector units are usually the most cost-effective. The size of some systems is now less than 12 inches in depth.

o Video quality on the best projectors now surpasses that available in a conventional commercial movie theater.

SYSTEM TYPES:

o Traditional TV: also called direct view, has the images displayed on a picture tube (Cathode Ray Tube).
  • LCD (Liquid Crystal Display) and Plasma TV can also be direct view. The LCD and Plasma TV systems are the "flat-panel" units.
    o Rear Projection TV (RPTV): uses a combination of mirrors and lenses to project the image from behind onto the viewing screen. This enables the displayed picture to be significantly larger, up to 70 inches or more. This technique usually offers the best value (picture size vs. cost).
    o Front Projection TV (FPTV): this is like a movie theater. The image is projected forward, to an external screen. But like a movie theater, a very dark room is required because the screen will reflect any light in the room. This technique is usually more expensive than rear-projection, but the footprint (the area consumed by the equipment) of the system is smaller.
  • DISPLAY TECHNIQUES:

    CRT (Cathode Ray Tube):

    The established standard for television displays; good value, picture quality. The maximum size of the screen is smaller with the technique. The technology is still a good choice where a smaller picture is desired, and bulkiness is not a concern.

    Liquid Crystal Display (LCD):

    Thin design, but has problems displaying images in motion (sports), the images tend to streak. These projectors usually contain three separate LCD glass panels, one for red, green, and blue components of the image being projected. As the non-colored light passes through the LCD panels, individual picture elements (pixels) can be opened to allow light to pass or closed to block the light. This produces the image that is projected onto the screen.

    Historically, LCD sets have had a problem with visible pixilation. This is less apparent on newer sets with higher screen resolutions.

    Most LCD systems use a fluorescent backlight, to shine through the LCD screen. This type of backlight will need to be replaced every few years. Some manufacturers are introducing sets with LED backlights, with a 10X longer lifetime. Even though the initial cost may be more, the cost of ownership advantage can make this design worth a look.

    Pros:
    o Better color saturation, more rich and vibrant
    o Better sharper image, important for text
    o More energy efficient

    Cons:
    o Poor black levels and contrast
    o Problems displaying images in motion (sports)
    o LCD panels (mainly in the blue channel) can degrade, causing shifts in color balance
    o Visible pixelation

    Liquid Crystal on Silicon (LCOS):

    A type of LCD Technology, LCOS uses liquid crystal rather than mirrors to project (usually rear projection) an image on the screen. LCOS is a good value compared to plasma and LCD sets, but expensive when compared to all other rear projection television technologies such as DLP. This technique uses a chip like a DLP (see below) set does, but the chip is coated with liquid crystal, which reflects the image seen on the screen. LCOS based systems allow for higher screen resolution than an LCD display or a plasma display.

    Pros:
    o Sharp, vivid colors, and deep black levels
    o It does not slowly change over time as a plasma set does

    Cons:
    o Dead pixels usually happen because the technology is partially reflective
    o High Maintenance Cost: LCOS requires frequent bulb changing requirements (anywhere from 6,000 to 8,000 hours, about 3-4 years with normal usage) versus 50,000 or more for most LCD or plasma screens. A replacement bulb will cost about $400
    o Reproducibility: Image quality can vary greatly from machine to machine

    Digital Light Processor (DLP):

    The DLP is a Texas Instruments product that is manufactured in Korea. It uses a chip with many mirrors (can be more than one million mirrors on a chip of about one square inch) that can be mechanically steered to reflect the correct color. This technology offers excellent display, at a moderate cost.

    In the best DLP projectors, like the ones in use at your local movie theater, there are three separate mirror chips, one each for the red, green, and blue channels. However, in the DLP projectors marketed for the masses, there is only one chip. In these sets, to define color, there is a color wheel that consists of red, green, blue filters. This wheel spins between the lamp and the DLP chip and alternates the color of the light hitting the chip.

    The spinning color wheel used to project the image can produce a problem on the screen known as the rainbow effect, which is colors separating out in distinct red, green, and blue. At any given point of time, the image on the screen is either red, or green, or blue, and the technique relies upon your eyes not being able to detect the rapid changes from one to the other. However, not only can some people see the colors separate, but the rapid sequencing of color may be responsible for reported cases of eye strain and headaches. But the vast majority of the people cannot detect the rainbow effect.

    Newer sets have the color wheel rotation speed doubled. Also, newer sets utilize a six-segment color wheel (instead of a 3 segment) that has two sequences of red, green, and blue. Because the wheel is at double speed, and because the red, green, and blue are seen twice in every rotation, the effect is a quadrupling of the rotation speed. This eliminated the visibility of rainbows for most of the people who previously saw the effect.

    Samsung and other companies have introduced DLP sets with LED lamps and no color wheel. The lamp bulbs in the older designs need to be replaced every few years. The LED lamp should last the lifetime of the television.

    LaserVue (Mitsubishi) is being introduced in the United States now in time for the Christmas season. LaserVue is a DLP system (Texas Instruments "Dark Chip 4" Digital Light Processor) that eliminates the conventional bulb and replaces it with a solid state laser. The performance of the video is outstanding, but the technology will cost you about $7000 for a 65" HDTV. The reliability/lifetime improvement may be better, but there is little data on this new laser. An Argon ion laser would be expected to have a lifetime of about 8000 hours (5-6 years of normal usage). The Mitsubishi LaserVue uses a laser system made by Arasor, an Australian startup company, made from lithium niobate (PPKN). Mitsubishi is currently performing accelerated stress testing, but has so far released no results. A LaserVue HDTV draws under 200 watts of electricity. That is approximately half that of comparable LCD HDTV, and less than a third of a plasma High-Def system.

    Pros:
    o Small package size
    o High contrast image with deep black levels
    o Good value

    Cons:
    o Less bright images
    o Rainbow effect
    o High Maintenance Cost: DLP requires frequent bulb changing requirements (anywhere from 6,000 to 8,000 hours, about 3-4 years with normal usage) versus 50,000 or more for most LCD or plasma screens. A replacement bulb will cost about $300-$400. Samsung is using LED illumination instead of lamps. The LED should not have to be replaced.

    Plasma Display:

    Thin design, high contrast ratings, Size up to 60 inches or more; some display limitations: costly, older systems had a high burn-in risk (over time, a memory of what was projected was retained); This could pose a problem for those who like to play video games or watch taped movies. If you put the game or tape on pause for too long, this could burn an image into your screen.

    Pros:
    o Exceptional picture quality: It can produce up to 8.6 billion colors, an accurate color reproduction and wide viewing angles
    o Large screen sizes: Some Plasma TV units are now manufactured in screen sizes that can span up to 100 inches
    o Lifetime: Plasma TVs are also known for their extended lifespan capacity of approximately 60,000 hours and great contrast (deep blacks)
    o Less Expensive than LCD

    Cons:
    o The displays are very bulky, heavy, and fragile
    o Burn-in
    o Slowly degrades over time
    o Energy inefficient

    Coming Soon: OLED (Organic Light Emitting Diode) HDTV sets are now available, but it will be a couple of years before they warrant serious consideration. An OLED set is less than 1" thick. OLED has already used in digital cameras and cell phones with small panels, because of their energy efficiency, which is important in portable devices.

    STANDARDS:

    o NTSC Analog TV or Standard Definition TV (SDTV): The current system that is being phased out (National Television Systems Committee).
    o EDTV (Enhanced Digital TV) : basically high-end Standard Definition TV: While these sets may be better than standard sets, the picture quality is not equal to HDTV. Technically, there is little difference between an SDTV and an EDTV (except for the higher price).
    o ATSC Digital TV: This is the new system (Advanced Television Systems Committee), which is not necessarily High Definition.
    o HDTV: is digital TV where the image is a wide-screen picture with many times more detail than is contained in current analog television pictures. Most consumers will see a huge improvement in image quality. HDTV has a better quality image than SDTV because it has a greater number of lines of resolution. The image is two to five times sharper because the gaps between the scan lines are narrower.

    SUMMARY

    Any of the four technologies can be a good choice. The competition is intense, and all of the technologies will continue to improve. Buying a TV will never again be as simple as it was before HDTV, but the benefits can be worth the headaches.


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