Computer hardware repair pdf

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Basic knowledge of safeguarding hardware. Apply the knowledge to repair/ maintain a computer. 2. Computer Hardware Repairs and. Build a fix that broken PC with the help from diy-computer-repair! With the DIY Co . Hardware that is not part of the system unit is sometimes The Ultimat. The A+ Certification & PC Repair Handbook The Complete Guide to Metal Boats: Building, Maintenance, and Repair PC Hardware: A Beginner's Guide.

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Computer Hardware Repair Pdf

Download free courses materials, tutorials training on computer repair and Description: This PDF includes aspects of the underlying hardware as well as how. models and troubleshooting. Level I: PC Hardware and Software Demonstrate an understanding of proper use of tools used in computer repair. 8. Define and. These course materials were developed for use in the PC Hardware, PC Repair, Repair and Maintenance of Personal. Computers, and Introduction to Local.

Three to then slowly disassemble the PC in the four periods to complete this task. If you are a beginner and actually want to learn something, then document well, and learn or re-affirm your knowledge about everything you see inside. Given a screwdriver, a year old could probably have the computer apart in a half-hour or so. If you're using this section as a lab or learning assignment, and you have your computer apart in the same time as a year old, then that's the level you'll be at. But if you take a slow relaxed approach, discuss, question and research each component as it's removed, you'll learn alot. Read the sections on What's Inside and What You See, fall back on your own knowledge, use the Internet, your books and resource material. It's impossible to retain all the information, so one of the most important computer skills you can learn is how to research and use your resources to find what you need. Here's an example of some questions to think about or discuss as you proceed: Should I document everything I do or everything I remove? Am I taking the best ESD precautions available to me right now. When you remove an expansion card what kind of card is it? What kind of expansion slot did it come from? How many bits wide is that slot? What is the bus speed? What does the card do? If there's any wires attached to the card, what's the other end attached to and what are the wires or cables for.

If you think it would be easier to remove some expansion cards before removing the drive bay, then do it. If you can better access the data cables after the drive is out, then do it that way. I think you get the point. Removing the Cover The standard way of removing tower cases used to be to undo screws on the back of the case, slide the cover back about an inch and lift it off.

Manufacturers are beginning to come up with trickier and more intricate methods of assembling these cases all the time. If there is no manual, then a little time taken for careful inspection may be in order.

Here are some things to remember: Don't Force Anything. If it has to be forced, it will probably break. If there are no screws on the back of the case for the cover, check the plastic faceplate on the front. Some pry off to reveal screws or release levers remember, careful inspection. If everything on the front has its own bezel around it including the LEDs then maybe the plastic front pops off or maybe the case slides off the front.

If you notice a separation between the sides and the top, then they must come off separately. My favorite ATX case allows you to remove two screws from the back, then slide the side panel to the rear an inch and remove it. The other side removes the same way. It's a good, solid, well built case.

Make sure any screws removed are for the cover. You don't want to unscrew the power supply by accident and have it fall inside your computer. That's a bad thing. After the case is removed, place it in a safe place, where it won't get knocked of a table, kicked or stepped on and bent.

Removing Adapter Cards Again, documentation is very important. Yes, that bit ISA card will probably work in any bit ISA slot, but there may be a reason it's in that particular one. Document the type of card and which slot it comes from. Check the card for any cables or wires that might be attached and decide if it would be easier to remove them before or after you remove the card.

Undo the screw that holds the card in place. Grab the card by its edges, front and back, and gently rock it lengthwise to release it. Do not wiggle it side to side as you can break the card, the slot, or the solder. Sometimes it helps to grasp the inside corner of the card with one hand and place a finger from the other hand under the associated port out the back of the computer to pry up the one end of the card. Once the card is removed, you may want to record any jumper settings you see, just in case one is accidentally dislodged.

Try to store the card in an antistatic bag. If you don't plan on replacing the card then a cover should be installed over the slot opening. Removing Drives Removing drives is not that difficult. They usually have a power connector and a data cable attached from the device to a controller card or a connector on the motherboard. CD-ROMs may have an analog cable connected to the sound card. The power will be attached using one of two connectors, a large Molex connector or a smaller Berg connector for the floppy drive.

The Molex connector may need to be wiggled slightly from side to side while applying gentle pressure outwards. The Berg connector may just pull straight out or it may have a small tab that has to be lifted with a tiny flat screwdriver. The data cables need to be documented. Remember the pin one rule.

Know where each one goes before you pull it out and record its orientation which side is the stripe on, where is pin 1? Pull data cables gently and carefully.

In other words, don't yank them off, and pull level and in the direction of the pins. Now you need to do a little more inspection, can the entire drive bay be removed? Does that particular drive come out the back of the bay or does it slide out the front before the bay is removed.

If a bay is removable, you may have to remove some screws or unclip a lever then slide the bay back and off. If the bay is not removable, there should be access ports on the other side of the case that allow for access to those screws there should be, I've seen some that you just about have to remove the motherboard to access these screws. Now you can remove the screws and slide the drive out the back of the bay.

If the drive slides out the front of the case, then remove the screws and gently slide it forward. Removing the Memory Modules Memory modules are one of the chips that can be damaged by as little as 30 volts.

Be careful of ESD and handle them only by the edges. It should now lift out. Put each SIMM in its own protective bag. Push the tabs down and away from the socket. The DIMM should lift slightly. Now you can grab it by the edges and place it in a separate antistatic bag. Removing the Power Supply Make sure it's unplugged.

All power connectors should be removed, including the connection to the motherboard and any auxiliary fans. Watch the little plastic tabs on ATX connectors you'ld rather not break them.

AT power supplies have a two piece power connector that may be labeled P-8 and P Make note of the orientation. The black wires should be in the middle, black to black. Remove the connection to the remote power switch at the front of the case. Orientation of the colored wires at this switch is critical. If you remove them, make sure you document well, and during re-assembly plug the computer into a fused surge protector before turning it on this could save your motherboard and components from melting if you've reconnected improperly.

If you're putting the same power supply back, it's better to remove the entire switch and leave the connectors entact. The remote switch on an ATX form factor attaches to the motherboard. Remove the four screws at the back of the case and gently slide the power supply out of the case. While removing these screws, hold onto the power supply. You don't want it falling into the case. Removing the Motherboard Document and remove all wire attachments to the motherboard.

Some of these have Pin 1 designations also. Most cases have a removable panel that the motherboard is attached to.

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By removing a couple of screws the panel can be taken off and you can gain much better access to the motherboard. Computer basics. Computer Architecture. Basic Computer course book.

This PDF book is designed for very novice computer users. It often contains oversimplifications of reality and every technical detail is purposely omitted. An Introduction to Computer Networks. This book is meant as a serious and more-or-less thorough text for an introductory college or graduate course in computer networks, carefully researched, with consistent notation and style, and complete with diagrams and exercises.

Your Own Computer Games with Python. An Introduction to Computer Security.

Evolution of Computer Systems. Introduction to Microcontrollers. Computer Communications Networks. Computer Concepts for Beginners. Home computer security. Remember, if you can feel a static shock its probably close to volts.

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Some ICs can be affected by as little as 30 volts. Always use an antistatic wrist strap. Keep a supply of antistatic bags to place components in as they are removed. Leaving the computer plugged in is a recommended procedure.

However, make sure it's switched off and remember that the cable going to the remote switch on the front of the case carries AC current at house voltage. Also, ATX motherboards have power to them all the time, even when the switch is off. Before beginning to remove a power supply or an ATX motherboard, always make sure your computer is unplugged.

Before Beginning You want to make sure you have what you need. Your wrist strap is attached to the computer, you don't want to have to run to the other side of the room or to another room to get something.

Forget about the strap and your computer may follow you. Have a pen and paper ready. Documentation is real important. After you've changed a few jumpers or removed or replaced a few cables and cards, you probably will have to put some back the way they were.

If you have documentation, putting things back together can be a simple reverse process. This is true of software troubleshooting as well.

Make sure you have the tools you need and they're all close by and handy. Be sure to have a container to keep the screws in so you have them when you want to put things back together. Make sure you have the resource material, drivers or software that you may need.

If possible, enter the CMOS setup and record the information available. At least record the floppy and hard drive configuration and any settings that may be different from the default. You want to be careful not to remove the battery and lose these settings, but stuff happens. Disassembly is major surgery, do a full backup of the system.

Programs that you have the original disks for can always be replaced, but any upgrades for those programs and any programs that have been downloaded from the Internet may or may not still be available. Bookmarks, e-mail addresses, phone and fax numbers, dial-up connections, DNS settings and networking protocols can be a real pain to replace.

Even the best technicians cannot guarantee your data, so back it up. Close all programs, shut down Windows, and turn off your computer. Then remove the cables from the back of the case.

One other thing: you have to use a little common sense. Don't necessarily follow this information to the letter, it's only meant to be a guide. If you think it would be easier to remove some expansion cards before removing the drive bay, then do it. If you can better access the data cables after the drive is out, then do it that way. I think you get the point.

Removing the Cover The standard way of removing tower cases used to be to undo screws on the back of the case, slide the cover back about an inch and lift it off. Manufacturers are beginning to come up with trickier and more intricate methods of assembling these cases all the time. If there is no manual, then a little time taken for careful inspection may be in order. Here are some things to remember: Don't Force Anything.

If it has to be forced, it will probably break. If there are no screws on the back of the case for the cover, check the plastic faceplate on the front.

Some pry off to reveal screws or release levers remember, careful inspection. If everything on the front has its own bezel around it including the LEDs then maybe the plastic front pops off or maybe the case slides off the front. If you notice a separation between the sides and the top, then they must come off separately. My favorite ATX case allows you to remove two screws from the back, then slide the side panel to the rear an inch and remove it.

The other side removes the same way. It's a good, solid, well built case. Make sure any screws removed are for the cover. You don't want to unscrew the power supply by accident and have it fall inside your computer. That's a bad thing. After the case is removed, place it in a safe place, where it won't get knocked of a table, kicked or stepped on and bent. Removing Adapter Cards Again, documentation is very important. Yes, that bit ISA card will probably work in any bit ISA slot, but there may be a reason it's in that particular one.

Document the type of card and which slot it comes from. Check the card for any cables or wires that might be attached and decide if it would be easier to remove them before or after you remove the card. Undo the screw that holds the card in place.

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Grab the card by its edges, front and back, and gently rock it lengthwise to release it. Do not wiggle it side to side as you can break the card, the slot, or the solder. Sometimes it helps to grasp the inside corner of the card with one hand and place a finger from the other hand under the associated port out the back of the computer to pry up the one end of the card. Once the card is removed, you may want to record any jumper settings you see, just in case one is accidentally dislodged. Try to store the card in an antistatic bag.

If you don't plan on replacing the card then a cover should be installed over the slot opening. Removing Drives Removing drives is not that difficult. They usually have a power connector and a data cable attached from the device to a controller card or a connector on the motherboard.

CD-ROMs may have an analog cable connected to the sound card. The power will be attached using one of two connectors, a large Molex connector or a smaller Berg connector for the floppy drive. The Molex connector may need to be wiggled slightly from side to side while applying gentle pressure outwards. The Berg connector may just pull straight out or it may have a small tab that has to be lifted with a tiny flat screwdriver.

The data cables need to be documented. Remember the pin one rule. Know where each one goes before you pull it out and record its orientation which side is the stripe on, where is pin 1? Pull data cables gently and carefully. In other words, don't yank them off, and pull level and in the direction of the pins. Now you need to do a little more inspection, can the entire drive bay be removed?

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