Computer repairing course in hindi pdf

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Computer Hardware Course Pdf In Hindi Basic computer tips in hindi Tricks, Computer Repair, Motherboard Repairing, Networking, Computer Hardware Course. Computer Hardware Full Course in Hindi |कंप्यूटर हार्डवेयर सीखे हिंदी मे |. कंप्यूटर Download Complete Hardware Course PDF. Download. Download Computer Hardware Course - Computer Hardware app is application developed to create "mobile Repair Course in Hindi" app has many features.

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Computer Repairing Course In Hindi Pdf

visual errors. You will find the online version and the latest PDF version at HwB .. pc-hardware-faq/part1>, maintained by Ralph Valentino . on a PC, externally to the processor (of course) . Download free courses materials, tutorials training on computer repair and maintenance in PDF files. Results 1 - 25 of and answers pdf fpga basics ebook pdf apple hardware basics computer basics ch 1 free computer basics books in hindi computer.

No part of this book may be reproduced or transmitted in any form or by anymeans without written permission from the author. Ilearned a lot from this book. It is gives you a step by step knowledge on what to do to repair yourlaptop. It is not that basic that you get bored. Still has a very easy to understand language that all typeof people can learn from. If you have a basic knowledge of Electronic and would like to step intolaptop repair world, I recommend this book highly. Help other customers find the most helpful reviewsWas this review helpful to you? Things you need to know to fix a Laptop! After reading the book in it's entirety, then rereading it a second time, I was able to repair a bunch oflaptop motherboards that I otherwise would have tossed out!! Great Book, would highly recommendthis to any computer technician.

The CPU and between the other components. If the computer has to process that word, it will be digitized to 6 bytes. The computer system are called hardware Eg monitor, keyboard, mouse etc. The manual has been designed to free you from needing to take lots of notes during. This is a very viable option these days and can bring many benefits you can learn a lot about computer hardware by building one, you get final draft save as pdf a totally personalized.

See the full list of free computer hardware courses and find the class thats right for you. A downloadable PDF file includes a students guide to the digital world. In a free society you have a right to ensure that.

There are typically 1 to 6 screws here, also look everywhere else on the upper half forscrews and remove all. The screen will get removed now as well. You will unplug all wires orcables coming out of the screen. These will include the display cable, the Wi-Fi antenna wires, theWebcam cable, Microphone cable and any other that might be there.

The Wi-Fi cables will also beplaced in a track along the upper palm rest and you will un-track these and pull the ends through fromthe bottom side. Unscrew the display hinges to release the screen from the lower half of the laptopand it should now pull away freely. Note that some laptops will attach the display cable differentlythe most common type of cable plug is one that pulls straight upward to release the cable, yet, othertypes will need to be pried outward from their casing port.

You will need to determine yours andslowly unplug the cable. If it gives any resistance, you should double check to ensure you areremoving it correctly. The ones that pull outward will always have a pulling plastic tab attached tothem to help you easily pull it apart.

With the screen hopefully removed now, you will again lookover the entire palm rest for any remaining screws. Let me also say here that on models such as the HP dv you will have to remove the 2 Riserscrews that are located on the bottom side and exactly next to the Wireless card port, these need to be removed before the palm rest can be removed. So look for strangely placed screw locations on boththe bottom and top before removing the palm rest.

The typicaltouchpad ribbon cable connection port will be the slide locking tab type, and you will gently slideboth left and right sides of the locking tab upward to release the cable. Look around the exposed areas of the palm rest and carefully unplug any cables that you can see. Also untrack any remaining cables or wires away from the palm rest. You should now be ready toremove the palm rest from the lower base. Most all palm rests will be snapped down to the base and to remove the palm rest you will needto unsnap all the tabs.

To do this, you will use a guitar pick or similar plastic pry tool, starting at acorner and making your way around the entire palm rest to unsnap all the locking tabs. You shouldnow be able to pull the palm rest away from the bottom base of the laptop.

You will be left with thebottom base and motherboard. Some Sony Vaio and Toshiba laptops have reversed this process and you will be removing thebottom base first, as the motherboard is attached to the palm rest. You should now have the bottom base and motherboard left over to disassemble, or the oppositeand you have the palm rest and motherboard left, this process will be the same for either, so I willjust refer to the bottom base method and you can use that in the same fashion to remove themotherboard from palm rest.

Now, with the bottom base in front of you, you will disconnect any remaining wires or cables thathinder the removal of the motherboard. You can remove any screws securing the motherboard to thebase. These screws will usually be marked on the motherboard with either a number or a symbol. Ifnot, you can use a marker to draw an x over the hole to remind yourself that it needs to have asecuring screw upon reassembly of the laptop.

Some laptops will have mini boards or daughter boards attached to them that will also need to beremoved or detached from the motherboard to complete the removal process. Once you think you have removed all the retaining screws, you can attempt to remove themotherboard from the base. Start this process by slightly lifting up on any given corner. I will usuallystart near the area opposite from the onboard headphone jack port or volume knob. I pull upwardslightly then outward making sure to pull any components like the audio out ports, or the VGA or printer port away from the case shell as to not damage any parts when removing the motherboard.

Be careful here as you candamage the ports or plugs by pulling to far on the motherboard. The Motherboard should lift right out, if it does not, do not panichere, simply go through the top and bottom again and pinpoint the location that it is stuck in and locatethe retaining screw. You should be able to determine where the location is that is keeping themotherboard from removal just by lifting up on the board and finding the area that is still stuck to thebase.

Finally, remove the motherboard and set aside, you are done with the removal, you can removethe fan and heat sink assembly now if still attached. Chapter 5Laptop Screen Disassembly Instructions Most screens can be disassembled without removing them from the bottom base, but some modelswill not allow removal of the front bezel without first removing the screen away from the base.

A lot of the newer laptops will have fewer screws used and more snaps. They will also useflat — hidden screw covers that are thick sticker tab covers and not the typical rubber shoe screwcover. Use a razor blade or extremely thin plastic tool to pry the screw covers away from the bezelmaking sure not to scratch the bezel or not to ruin the screw cover.

Once all the screws are removed, 2 to 8 , you can remove the front bezel from the rear lid. This does not just lift right off now… it will be snapped onto the rear panel and you will need toun-snap all the locking tabs all the way around the screen.

You will start this process using a guitar pick or similar tool and start at the upper right corner ofthe screen. Wedge the pick between the bezel and the rear panel and pry towards the front — pryingaway from each other, you will eventually unsnap the nearest snapping tab then continue around thelid.

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I have found it easier if you slightly bend the area you are unsnapping inward toward the center ofthe screen and the locking panel tab will release easier. When you get to the bottom of the screen front bezel it can sometimes be tricky to remove thisarea. This area will sometimes also have double sided tape securing the 2 pieces front and back together, and you will need to pull on the bottom bezel piece while lifting in an upward motion torelease the piece.

The way I do it is I will loosen the top of the bezel, then, I will go down each side. Take a look at the hinge area, some laptops are built so that the front bezelcurves around and under the hinge, so if you are removing the bezel without first removing the screenand hinges, you will have to bend the bezel outward and then upward to pull it away from the hinges.

It is a bit tricky but with practice it gets easy. Also note that certainmodels like DELL will have a hinge extension piece that extends into the hinge cover. So if you areremoving the bezel without first removing the screen away from the laptop, you will need to pull thisextension piece out of the hinge area, do this carefully but you will be able to with some patience…Hopefully you have removed the front bezel, I will now move on.

You should have the screen in front of you, the hinges and hinge rails should still be connected. You will first want to remove the retaining screws that secure the screen side rails to the screen.

These side rails are almost always directly connected to the hinges. Typically there are 2 to 4 screwson both sides of the screen, magnetize your Micro sized Phillips head screwdriver and remove allscrews on both sides of the screen, set aside. Some hinge rails will also have screws at the top that you will be removing and on the bottom youwill remove to allow the screen to be removed.

I will typically leave the bottom screws — securingthe hinge to the lid — unscrewed, and I will pull the screen away from the rear lid the only tricky partdoing it this way is the bottom — side rail screw, it can be difficult to remove this one withoutloosening or removing the bottom hinge screws.

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If able to, unplug the display cable wire set thatruns to the power inverter. Grab the top center of the Display Screen and pull it forward to lie it flat face down in front ofthe lid. Note that this screen will rest on the palm rest if you are doing this without removing thescreen from the laptop bottom base… You have the screen face down so that you can detach the display cable from the rear side of thescreen.

All Display cables will have a piece of Pull Tab Tape attached to them. Some display cables will also have a rectangularmetal wire pull tab with a blue, white or black plastic pull tab attached. You will do the same withthese and grab the end tab pulling it downward to release the display cable from the plug port. Some cables will also have locking tabs on the left and right side. To release the cable, you willneed to depress both the left and right sides simultaneously while pulling the cable flat away notupward… Assuming you already unplugged the power inverter, set the screen aside and you will havecompleted the screen disassembly.

Any remaining parts will stay in place. Some screens will also have secondary horizontal support rails, remember their position whenreassembling and do not forget to reinstall them. Both are still consideredLCD Screens because they are. The Image to the screen is Liquid Crystal Display; it is only thelighting that will change for these 2 types. TheCCFL bulb is a thin glass tube with a protruding metal pliable rod on either side.

Wires are solderedto both ends of the bulb then attach to a plug that will plug into the power inverter… You will need tosolder the wires to the ends if you ever need to order a replacement bulb. You can however usuallyfind replacement bulbs that come prewired with plugs also attached. You get the same size bulb asyour screen specs specify.

When disassembling the screen, you will start by removing the power inverter if it is attached. You will notice that all screens are framed with a thin metal frame. This helps to hold all the screenparts together it also helps by framing the front screen glass panel in and protects the glass edges fromharm. You are going to use a Razor Blade here to help separate this metal frame from the rest of thescreen.

This frame wraps from the front of the screen panel to the top of the panels edges all the wayaround the screen. Most screens will have 1 or several pieces of tape that cover the frames edge. Youneed to run the razor blade edge between the seam of the screen frame and the aluminum bulb backingplate. To do this you will flip the screen to its back side and start at the top of the screen, running therazor from right to left.

Be very careful not to cut the LCD bulb wires or scratch any of the screenpanels. The sides of the screen will usually have securing tape that you need to either peel away orcarefully cut to separate the front metal frame. Once you have cleared any securing tape, you will now be unsnapping the metal frame away fromthe screen panel.

You will need a Plastic Pry Tool assist you in removing the frame. The best toolwould a guitar pick. You need to start at the top. It is imperative that you do start at the top of thescreen when removing the frame because you are not completely removing the frame you can, but itis not needed to change a bulb.

You will wedge the pick in between the seam of the frame and screen panel top side. Slightly pryupward near one of the imprinted tabs on the frame and push outward away from the front of thescreens glass panel.

Do not force this frame away or you might crack the screen. Go Slow, HavePatience and you will easily be able to separate this frame… Slide the pick back and forth from theright side end of the frame to the left end side. You will now see an aluminum bulb guard on the rear upper side of the screen. This cansometimes have a micro sized screw on each side so look real close for one and remove it.

Now,right where the screw you just removed was, flip the screen to the side and parallel with the bulbguard screw will be a screw on the side of the screen again it will be a micro sized screw and willneed to be removed, the same goes for the opposite side of the screen, then again there might be asecond screw on the side of the screen towards the bottom of the side.

Some will have these andsome will not. The object now is to pull this metal bulb tray up and away from the screen to swap out the bulb. In the above photo, the red arrow shows the metal bulb tray and the blue arrow shows you will besliding it outward to remove, after you free the LCD wires. Remove any tape that is securing the LCD bulb plug wires to the screen bottom side usually apiece of thin yellow tape.

You should now see a white tab that the wires track through. One wire is short the other long. The long wire willbe stuck to the thin horizontal plastic strip that runs along the top front of the screen, you simply willpull on the bulb wire to release it from the track along the front; it should peel right off.

You will use a fingernail or a plastic pry tool to push the metal bulb tray upward, start on oneside then slightly slide it a little bit, then go to the opposite side and slightly lift it, alternating until itis free from the screen. Be very careful when doing this otherwise the bulb will break though it isalready broke which is why you are changing it. Once you have the metal bulb guard free, set thescreen aside. The bulb guard will have the bulb still inside its tray, there is actually a smaller metaltray inside the large metal tray, you can go ahead and separate these trays from one another now.

Lookat both ends of the LCD bulb… this is typically where a bulb failure will occur at either end. Eitherthe wire will overheat and will break, or it will deteriorate the wire to a very fragile state so that ifyou were to wiggle it slightly it would snap and break. Look at the very ends of the bulb too, a faultybulb usually shows a blackish color at the end or both ends… this is due to internal bulb heat…which is why laptops can have color wash-outs pinks, oranges, reds to where the whole view of thescreen when illuminated has a pastel transparent colored tint to it, the tint can change colors as well,and you can sometimes hear a faint buzzing noise from the bulb.

Flickering of the light on and off isanother signal that the bulb is failing. Once again, look at the bulb ends you should have only the smaller metal bulb guard and the bulbin front of you , there are white rubber caps on each side covering the LCD bulb power posts.

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You do not want tolose these caps… they are not glued on, they only slide on, and can easily fall off, so be verycautious. Notice here the placement of the bulb wires at both ends, notice that they do notprotrude straight out the back end of the bulb? So, when replacing the bulb, you will make sure the ends are properly recapped with the whitegrounding rubber caps and that the wires are placed facing the correct direction for reassembly.

If youneed to, take photos while you work to be able to remember assembly and reverse process. The Power inverter is the only part left for screen repairing.

You can only do so much to repair the inverter if failure occurs. It is the part with thecopper wire wrapped all around it… a longrectangular shaped component with legs on both ends usually 2 to 3 on one side and 2 to 6 on theother — the legs attaching to contact pads on the inverter board. You will need to use a soldering gunand flux paste.

I will now show you how to order a replacement screen for the specific laptop in question. To replace a cracked screen or what ever the issue… you can order the screen by the modelnumber of the laptop, but I do not recommend doing so and it is the Lazy way to replace it.

Not only is it not correct, it could harm the laptop by possibly installing an incompatible screen. The replacement screen part replacement number will almost always include the screens size in thenumber. Now, notice the TL and the A2 … this is very important that you replace with the sameexact numbers. The mostcommon would be a faulty DC Jack. Though other things like a faulty GPU, or incorrectly seatedRAM, or a blown motherboard component, a bad battery, a damaged hard drive, a short in the acadapter, or even liquid damage can as well… So you see; it is not only the power area that can failrendering the laptop unable to power on and stay powered on it can be a variety of different issues,and it will be up to you to do process of elimination testing to rule out all other possible problemsand pinpoint the exact component causing the issue.

I will go ahead and give you a few scenarios and then resolve the issues for you by showingyou how to do process of elimination testing. Okay, Now for the process of elimination testing to determine the issue. You will want to first check all the easiest things that you can, the easiest parts to access get looked atfirst. S tart by removing the battery.

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Plug the AC Adapter in and try powering on… If the same,continue on…Next, remove the RAM cover on the underside of the laptop some RAM slots are also situated underthe keyboard on the top side of the Motherboard; you will determine the location and reseat bothsticks. Then attempt to power back on after reseating the RAM. Liquid damage to the hard drive is a common reason this canhappen… Liquid damage to the internal components can cause power redirection where the contactpads join and when this occurs, it will tell the motherboard to shut down to prevent further damage.

Ifthe laptop is still not powering on, continue with process of elimination testing… So you have now ruled out the Battery, the DC Jack, the RAM memory and the hard drive as beingthe causing issue.

Note here, that, you have ruled out the DC Jack simply because it is powering oninitially, then, shutting down. If the jack were faulty, you would get no power initially, or theshutdowns would be more sporadic and only occur when the cord or plug were moved slightly. While disassembling the laptop, you will be looking for certain things along the way as the root ofthe failure causing the laptop to not power up properly.

You will basically be looking at everything. So you will need to closely look at all parts and components now todetermine where the failure has occurred. Your mindset now will be … looking for signs of liquid damage, looking for motherboard damage,looking for blown components. Blown components you say? Yes, and quite common though nothing like a Desktop computercomponent failure.

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