Lesson about Computer Hardware Repair and Maintenance

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RICO V. COMBINIDO
Part-time Faculty, IT and CE Unit

2. • Course orientation
• Re-introduction to computers and computer systems,
• Differentiate types of computers.
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5. This course is an exploratory, first course for students in Information
Technology. However, it also meets the need of students in other fields, as a
course that provides hands-on training in the installation, configuration,
optimization and upgrading of computer systems.
As a practical course, the focus is to impart useful skills on the students in order to
enhance ability to install, troubleshoot, repair and maintain computer systems.
Topics to be covered include introduction to computer systems, computer system
parts, maintenance techniques, approaches and tools; diagnostic techniques;
system assembly and installation; troubleshooting and repair of computer systems
and accessories.

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8. They help us get repetitive tasks done quickly and
accurately. And they are tireless and do not fear
complexity.
Computers are able to process data and perform
operations at a rate of millions per second. They can get
a task done much faster compared to the time it would a
human to complete the same task.

9. Computer is used because it is more efficient and
effective. Computer hardware is accessed through
Software (operating System)
Source: https://www.freecodecamp.org/news/what-is-a-pc-computer-
definition-and-computer-basics-for-beginners/

10. It means we can add any number
of application software to this and
extend its functionality.
It means it is used in almost all
places like hospitals, business,
education, research, etc.
Source: https://www.freecodecamp.org/news/what-is-a-pc-computer-definition-and-computer-basics-for-beginners/

11. • Creating information
• Taking data as input from an external
resource
• Processing the data into something
useful.
• Storing all kinds of information and
instructions into memory and retrieving
them when required or requested.
• Generating some kind of output.
Source: https://www.freecodecamp.org/news/what-is-a-pc-computer-definition-and-computer-basics-for-beginners/

12. • Hardware are the physical components you can
touch, and they are located on both the outside
and the inside of a computer.
• These are also the parts that perform all the
operations and execute instructions.
• Software are collections of programs that tell the
hardware components what to do and how to
behave. They give the hardware the instructions it
needs to execute in order to get things done.
• Programs are a set of instructions in the form of 0s
and 1s (or binary code). They are commands that
need to be executed in sequential, logical order.
Source: https://www.freecodecamp.org/news/what-is-a-pc-computer-definition-and-computer-basics-for-beginners/

13. You can get a visual representation
of how a computer works on the
inside by looking at something
called a block diagram of a
computer.
https://codescracker.com/computer-fundamental/block-diagram-of-
computer.htm
You could also say that the computer's block
diagram will show us how the computer
functions, beginning with the input of data and
ending with the output of the result.

14. The CPU can be called the brain of a
computer system.
https://codescracker.com/computer-fundamental/block-diagram-of-
computer.htm
The central processing unit (CPU) is where the
majority of the important calculations and
comparisons are performed. In addition, the
CPU is in charge of turning on and controlling
the operation of the other units.

15. Arithmetic Logic Unit (ALU)
https://codescracker.com/computer-fundamental/block-diagram-of-
computer.htm
The arithmetic logic unit is responsible for carrying out
all of the mathematical operations, including addition,
subtraction, multiplication, and division. In addition to
that, a logical operation is used for the comparison.
Control Unit (CU)
In addition, the control unit of a central processing unit is
responsible for directing the overall operation of a computer. In
addition to this, it exercises control over all devices connected to
the CPU, including memory and input/output devices.
The CU is responsible for retrieving instructions from memory,
decoding those instructions, interpreting those instructions to
determine what tasks are to be carried out, and then sending
appropriate control signals to the other components so that
they can carry out the steps necessary to execute the
instruction.

16. The input/output unit is made up of different
devices that are responsible for transmitting
and receiving information between the
memory of the computer and its users.
https://codescracker.com/computer-fundamental/block-diagram-of-
computer.htm
The information that is entered into the
computer via the input unit is saved in the
memory of the device for later processing. The
completed processing can then be saved in the
memory and either recorded or displayed on the
output medium.

17. Memory units are an integral part of any
modern digital computer. It is the repository
for all of the results, both intermediate and
final.
https://codescracker.com/computer-fundamental/block-diagram-of-
computer.htm
The data that are read from the primary storage
or an input unit are moved to the memory of the
computer so that they can be processed.
Moreover, The data that needs to be processed
and the instructions that need to be carried out
are both stored in this memory unit so they can
be accessed quickly.

18. Before a computer can begin the process of
actually using the data and instructions that
it has received from an input device, the
data and instructions must first be stored
inside the computer.
https://codescracker.com/computer-fundamental/block-diagram-of-
computer.htm
Primary and secondary storage units are the two
categories that can be found in a storage
facility. Now let's briefly define these two
storage units one by one, starting with the
"primary storage unit."

19. Primary Storage
https://codescracker.com/computer-fundamental/block-diagram-of-
computer.htm
Primary memory is connected to the input unit as
well as the output unit in a straightforward manner.
It stores both the data that was input and the result
of the calculation.
Secondary Storage Unit
It is not possible to store data permanently on the
primary storage for use at a later time. Because of
this, additional forms of data storage technology,
also known as secondary or auxiliary storage, are
required in order to store the data in a manner that
is both permanent and accessible over an extended
period of time.

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21. Build with thousands of processor,
supercomputers are used for highly
calculation? intensive tasks such as problems
including quantum physics, weather
forecasting, climate research, oil and gas
exploration, molecular modeling and physical
simulations such as nuclear fusion.
The Tianhe 2 supercomputer of China.

22. • The first supercomputer was designed by
Seymour Cray in 1960’s.
The Frontier (top) and Fugaku (bottom)
supercomputers. The top 2 world's fastest.
• As of November 2022, the Frontier
supercomputer from USA still remains as
the world's fastest supercomputer,
followed by Fugaku of Japan, LUMI of
Finland, Leonardo of Italy and Summit of
the US.

23. • They are commonly used for critical applications
and bulk data processing such as census,
industry and consumer statistics, enterprise
resource planning, and transaction processing
The IBM System Z mainframe coomputer.
• Mainframes are designed to handle very high
volume input and output (I/O) and emphasize
throughput computing. Mainframes are
measured in millions of instructions per second
(MIPS).

24. • With higher configuration than a personal
computer, main applications include running a
multi-user operating systems, 3D graphics and
oil and gas exploration and simulation as well
other application which requires high
computing power.
• One example is illustrated by the image on the
right which is the Dell Precision T7910 with
Intel Xeon 2.3 GHz processor with 10 cores, 32
GB RAM and NVIDIA Quadro 4GB graphics
card.
The Dell T7910 workstation computer.

25. • They utilize peripheral devices for interaction,
such as a keyboard and mouse for input, and
display devices like a monitor, projector, or
monitor.
• Desktop computers can have a horizontal or
vertical (tower) form factor, or be combined
with a monitor to create an All-in-One
computer. Unlike a laptop, which is portable,
desktop computers are generally made to stay
at one location.
A modern desktop computer

26. • They can easily be transported and conveniently
used in temporary spaces such as on airplanes,
in libraries, temporary offices, and at meetings.
A modern Lenovo Ideapad laptop.
• Laptop computers generally cost more than
desktop computers with the same capabilities
because they are more difficult to design and
manufacture.

27. • They offered features such as calendar and note-
taking capability. PDA operating systems include
Apple iPhone OS, Symbian OS, Palm, Windows
CE, Windows Mobile, Blackberry, and Google's
Android, among others.
A personal digital assistant
• PDAs have become increasingly networked,
offering 802.11 and in some cases cellular
networking. PDAs have become so powerful that
they are sometimes used as desktop or laptop
replacements.

28. Smartphones are portable devices that combine
computing and mobile phone capabilities. More precisely,
smartphones retained the ability to conduct calls and send
SMS messages found with the older feature phones while
adding capabilities traditionally found on desktop
computers.
Tablets represent the middle ground between laptops and
smartphones but are best described as handheld
computers. They represent a mashup of laptop and mobile
phone features, but what you receive in the end is a unique
product.

29. Further questions shall be entertained on our Messenger group.
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