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By using our site, you agree to our collection of information through the use of cookies. To learn more, view our Privacy Policy. To browse Academia. Details are provided on page 2 of this text on what kind of toolkit to buy, and where to buy it. Melwin Syafrizal. Dini Siti Nurwulan. Prabowo Pangestu. Giga Mirianashvili. Log in with Facebook Log in with Google. Remember me on this computer.

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Download Free PDF. Adeiza Emmanuel Ссылка на подробности. Related Papers. Using Information Technology 9th Complete Edition Подробнее на этой странице Perakitan Komputer X. Windows 10 Troubleshooting. Lloyd, Reproduction of these materials is prohibited without the express written consent of the author. BAT Understanding. I developed these materials myself, with a view towards making complex issues in PC hardware and maintenance easy to understand.

Through several years жмите сюда teaching these courses and refining these materials, I believe this manual will be a useful resource for the reader. I would like to express my deep gratitude and sincere thanks to a number of people who have made the development and implementation of this course possible over the years: o My wife, Joyce, and my three children Christina, Matthew and Davidwho have shared me with hundreds of students over the years; o William Lauffer, the dean of Engineering Technology at Prince George's Community College, who gave me the opportunity to develop and teach these courses; o Dirk Faas, Bradley Faas, and Darrell Mattheis, my engineering assistants, who have made me look good so many times and have helped so many students when there wasn't enough of me to go around 20 students at a time; and o Michael Wiggins, Ken Chapman, Dan and Polly Dyer, Paul Blose, Rick Caceres, Mary Waynes, John Peoples, Robert Chang, Godwin Larbi, Jim Offutt, Alan Wurtzel, and all of the жмите and volunteers of Computer Reclamation, Inc.

The creative input, hard work, and selfless sacrifice of these individuals has helped to make me the instructor that I am, and the raw materials that Computer Pc repair and maintenance a practical guide free download provides helps the students to become the repair technicians they desire to be. The work we do together helps so very many people, and your contributions are recognized and applauded here. Reproduction of these materials without the express written permission of the author is prohibited.

If you would like to obtain a copy of these materials, if you would like to have me come and teach my courses for your organization, or if жмите сюда would like to license this curriculum for use with your school or non-profit organization, please contact me at the following address: William A.

We have voltmeters in the lab, so you don't have to run out and buy one. Make sure the store has the kits before you travel out there.

I simply give them as sources other students and colleagues have used in the past to find decent toolkits for these courses. Yes, it is. However, what you will read here will be covered in the lecture AND in the notes package I have given you. It reinforces what we talk about in class, and will give you good questions to ask. What if I don't understand something?

Don't worry. Make a note of your questions, and bring them up in pc repair and maintenance a practical guide free download. This is your opportunity to fill in gaps in your understanding of how PCs work. The textbook is written in fairly non-technical English, so it will serve as a good tool for learning. You will learn about the following kinds of things: nokia pc suite setup file download Electrical power and surge suppressors o How do computer viruses affect your PC, and how do you deal with virus problems?

This course manual covers all of the topics that will be discussed in the lecture clash of pc download free survey of the class. Your instructor will follow the outlines laid out in this manual. The manual has been designed to free you from needing to take lots of notes pc repair and maintenance a practical guide free download the lecture sessions As the lecture progresses, review the manual and add any explanatory notes into the space provided on each page.

At the end of section one, there is a list of all of the major questions that will be asked on the first test. Use this information as a checklist to prepare you for the first test. Be sure to do the required course readings in the textbook as well There are periodic fluctuations in voltage from devices going on and off in your building, problems in the transmission line, electrical storms, bad or faulty transformers, etc. Sometimes these fluctuations in voltage may exceed several thousand volts.

When this happens, bad things can happen to good computers or any other kinds of electrical devices. Surge Suppressor A surge suppressor provides a way to deal with voltage spikes but not loss of voltage. The surge suppressor has a metal- oxide varistor MOV that will shunt excess voltages to ground, thereby saving your PC. When buying a surge suppressor, the most important thing to check for is the clamping voltage of the unit.

The clamping voltage is that point when excess voltage will be diverted to ground. A good suppressor will have a clamping voltage of approximately volts, and will have a Underwriter's Laboratory UL listing of UL This is sufficient to protect your PC from harmful excess voltage. Reliable surge suppressor are made by the following companies: - APC - TrippLite - Curtis As long as the suppressor has the UL rating and a volt clamping voltage, it will serve you well.

Uninterruptible Power Supply An uninterruptible power supply UPS will have this same technology, but it contains pc repair and maintenance a practical guide free download battery in it as well. The battery in the UPS will allow your PC to continue to operate if power has been cut off to your building. If you have intermittent voltage failures in your area i.

It will save you immense amounts of grief when using your PC, since all the information stored in RAM is wiped out when power is cut off. A virus will go to that location on your disk and corrupt these files IO. A virus will corrupt the FAT so that you cannot locate or access your files.

A virus can corrupt your partition table, which wipes out ALL of your files pc repair and maintenance a practical guide free download an instant. COM and. A virus can attach itself to one new york taxi simulator pc these kinds of files and corrupt the way it operates.

Both of these are shareware programs, and are available from the instructor upon request. All CPUs before this had separate math co-processors. The Mueller textbook has further information on the different CPU chips that can be installed onto a motherboard. Has a fan on it to cool the computer. Uses pin AND pin cables to transmit data. Uses pin ribbon cable to transmit data. SCSI drives are also more expensive.

Uses pin or pin cable to transmit data. If you wish to find additional information about the different types of hardware inside your PC, refer to the Mueller textbook. You will need to know the definitions listed on these pages in order to answer specific questions on the first exam.

ISA bus connectors are black in color, and transmit either 8 or 16 bits of data at a time. The shorter black connectors are 8-bit connectors, and the 2-part black connectors are bit connectors. A 2-level card-edge connector allows ISA cards to be pressed down into the first level of the connector, while EISA cards are designed to be inserted even further down into the connector, allowing the pc repair and maintenance a practical guide free download to access the bit data lines at the bottom of the connector.

Special bit EISA cards were manufactured by a limited number of companies, and the cost of EISA devices such as drive controllers, video cards, etc. VESA-Local Bus Connectors A number of major computer manufacturers turned to the Video Electronics Standards Association pc repair and maintenance a practical guide free download develop an inexpensive, fast bit bus connector that could be easily implemented within standard PC architechture.

A third connector is added to the адрес страницы bit ISA bus connector, and this connector passes bits of data at a time directly to the CPU, bypassing the DMA and Interrupt controller chips. Other devices sound cards, modems do not require fast bus connections, and would be inserted into standard ISA bus connectors.

The bus connector is white in color, and smaller than all of the other types of bus connectors. The bus connector transmitted either 16 or 32 bits of data, using bus mastering to allocate IRQ and DMA channel resources. Normally, you hear only one short beep. Here is what the DOS Audio Error codes mean: No display, no beeps: No Power Pc repair and maintenance a practical guide free download beep: Power supply failure Repeating short beeps: Power supply failure One long and two short beeps: Display adapter video card failure One long and three short beeps: Display adapter video card failure See the Mueller textbook for a more extensive list of PC pc repair and maintenance a practical guide free download codes.

By using error code messages and audio error code messages, you can determine what components in your computer have failed, and you can begin the process of repairing your computer. Specifically, it records what type of video card, floppy drives, hard disk, memory and so forth are contained in your PC.

It's important to keep a record of what specifically is inside your computer, and that you have a record of what is written into CMOS RAM. If it cannot display such a message, it will beep in a specific pattern that indicates exactly what is wrong. If everything is OK with the computer, POST will sound one beep to the system speaker, indicating that all of the tests по этой ссылке normally with no errors.

SYS, the boot loader program of your operating system. If it can't find this file in that location, the PC will give an error message to the screen. When it does find the file, it loads the file into RAM, and then your operating system takes charge of the computer. It contains the bulk of the operating system code that makes DOS or Win95 operate. Specifically, it lets you manage file names, execute programs, and allows hardware and software to manage interrupt IRQ requests.

SYS configures your system for the specific kinds of hardware that are contained in the system.

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