This chapter discusses disassembling and reassembling computers. It covers important safety topics like preventing electrostatic discharge which can damage components. Tools and proper technique are needed to safely disassemble parts like the motherboard, cables, and hard drives. Diagramming the assembly is crucial for accurate reassembly. Taking care with components and reinstalling everything correctly helps ensure the computer functions properly.
Disassembling Of the old working pc
In this Instruction, I will give a full documentation of how to disassemble a desktop PC, for parts. The specific computer that I will demonstrate with is an HP Media Center PC m7640n with a dead motherboard. Every computer is different, but this is a general guide.
If you don't fully grasp what I mean when I am describing something, please refer to the pictures!
Step 1.
Selection the required tools and equipment:
1. Screw Driver.
2. Multimeter.
3. Soldering iron.
4. Contract cleaner.
5. Brush.
Step 2.
To turn off the power:
If the PC being running, must shut down the pc before disassembling.
There are many ways to shut down your PC—you can turn the PC off completely.
Turn your PC off completely
To shut down:
For Windows 10 Select the Start button and then select Power > Shut down.
For Windows 8.1 / Windows RT 8.1
Move your mouse to the lower left-hand corner of the screen and right-click the Start button or press Windows logo key + X on your keyboard. Tap or click Shut down or sign out and choose Shut down.
For Windows 7 Click the Start button and then click the Shut down button. Click the Start button and then click the Shut down button.
Step 3: Unplugging
The first thing you do, is unplug every cable that's plugged in to your computer. That includes the following cables:
________________________________________
• Power
• USB
• Firewire
• Mouse
• Keyboard
• Internet
• Ethernet
• Modem
• AM\FM Antenna
• Cable TV
• etc...
So pretty much just unplug every cable from your computer.
Step 2: Outer Shell/Casing
Now that your computer is fully unplugged, move your PC to a clean work space, preferably a carpet. The carpet is better than tile, because screws and other small parts will roll around.
NOTICE:
If you are working on a carpet, about every five minutes touch something that is grounded (Sink faucet\pipe, wire coming from the ground part of a wall outlet). This is so you don't shock your motherboard or other parts.
First off, unscrew the four screws on the back of the computer. On most computer cases, there will be large knobs that you can unscrew by hand or by screw driver on the back-right side of the computer. The left side has small screws because on that side you can't access much on the inside.
Once the screws are removed, you can remove the side panels. On most computers, they just slide off. Start with the left side panel (the side that once had the knobs), slide it towards the back of the computer. Now you can remove the left panel. Just like the other one, slide it towards the back of the computer.
Please refer to the pictures if you are confused!
Step 3: Outer Shell/Casing (cont.)
In the last step I removed both side panels. In this step, I will be removing the front and top panels.
________________________________________
Wait For Next Part...
Disassembling Of the old working pc
In this Instruction, I will give a full documentation of how to disassemble a desktop PC, for parts. The specific computer that I will demonstrate with is an HP Media Center PC m7640n with a dead motherboard. Every computer is different, but this is a general guide.
If you don't fully grasp what I mean when I am describing something, please refer to the pictures!
Step 1.
Selection the required tools and equipment:
1. Screw Driver.
2. Multimeter.
3. Soldering iron.
4. Contract cleaner.
5. Brush.
Step 2.
To turn off the power:
If the PC being running, must shut down the pc before disassembling.
There are many ways to shut down your PC—you can turn the PC off completely.
Turn your PC off completely
To shut down:
For Windows 10 Select the Start button and then select Power > Shut down.
For Windows 8.1 / Windows RT 8.1
Move your mouse to the lower left-hand corner of the screen and right-click the Start button or press Windows logo key + X on your keyboard. Tap or click Shut down or sign out and choose Shut down.
For Windows 7 Click the Start button and then click the Shut down button. Click the Start button and then click the Shut down button.
Step 3: Unplugging
The first thing you do, is unplug every cable that's plugged in to your computer. That includes the following cables:
________________________________________
• Power
• USB
• Firewire
• Mouse
• Keyboard
• Internet
• Ethernet
• Modem
• AM\FM Antenna
• Cable TV
• etc...
So pretty much just unplug every cable from your computer.
Step 2: Outer Shell/Casing
Now that your computer is fully unplugged, move your PC to a clean work space, preferably a carpet. The carpet is better than tile, because screws and other small parts will roll around.
NOTICE:
If you are working on a carpet, about every five minutes touch something that is grounded (Sink faucet\pipe, wire coming from the ground part of a wall outlet). This is so you don't shock your motherboard or other parts.
First off, unscrew the four screws on the back of the computer. On most computer cases, there will be large knobs that you can unscrew by hand or by screw driver on the back-right side of the computer. The left side has small screws because on that side you can't access much on the inside.
Once the screws are removed, you can remove the side panels. On most computers, they just slide off. Start with the left side panel (the side that once had the knobs), slide it towards the back of the computer. Now you can remove the left panel. Just like the other one, slide it towards the back of the computer.
Please refer to the pictures if you are confused!
Step 3: Outer Shell/Casing (cont.)
In the last step I removed both side panels. In this step, I will be removing the front and top panels.
________________________________________
Wait For Next Part...
This section describes and covers the proper use of a variety of hardware, software, and organizational tools specific to working with computers and peripherals.
This section guides you on your first steps of the journey through the IT Essentials course and you will often encounter terms and concepts introduced here throughout the course.
This section describes and covers the proper use of a variety of hardware, software, and organizational tools specific to working with computers and peripherals.
This section guides you on your first steps of the journey through the IT Essentials course and you will often encounter terms and concepts introduced here throughout the course.
Reasons why Hardware is Installed and Potential Problems and the PrecautionsAjay Jassi
In this presentation it explains why hardware is installed and the problems that can happen, It also explains how it can be prevented.
This presentation is part of my IT coursework*
Dell Precision 7530 là một trong những máy trạm di động mạnh nhất trong phân khúc 15 inch. Nó dẫn đầu lớp về các tùy chọn thông số kỹ thuật, với một loạt bộ xử lý cũng như các tùy chọn lưu trữ và bộ nhớ tuyệt vời. Một lựa chọn phong phú các cổng I/O hoàn thiện bức tranh cho một thiết bị thực sự chuyên nghiệp. Tuy nhiên, thông số kỹ thuật xuất sắc của 7530 phải trả giá bằng một thiết bị khá nặng và cồng kềnh và hiệu suất pin thấp.
Master Laptop Repair: Unlock the Secrets of Schematic Learning and Become a S...Tre Media
Master Laptop Repair: Unlock the Secrets of Schematic Learning and Become a Skilled Technician - A Comprehensive Guide for Beginners to Advanced Users
This book is made for laptop technicians, either beginners or someone who learn to repair laptops and want to learn more about everything related to laptop repair.
Equipped with an introductory guide to the components contained in a laptop. Also equipped with how to measure components and how to repair a laptop based on the scheme.
As a technician, the service manual serves as a standard laptop unloading procedure. If there is the latest series that we never do maintenance on the laptop, then the service manual may be needed. There are many wrong procedures in dismantling and assembling, and it can cause the case to be cracked or broken. Some other descriptions can be our guide on the field. On the official website of each laptop, the brand provides a service manual for its products. Example: up screen short from DOC (Service Manual).
Unlock the mysteries of laptop schematics and elevate your repair skills with our comprehensive guide. Learn essential techniques to troubleshoot and fix hardware issues like a pro. Dive into the world of schematic learning today!
2. Chapter Objectives
After completing this chapter you will:
• Understand how static electricity can damage a computer.
• Understand what type of equipment causes RFI and EMI.
• Know which tools a technician needs.
• Understand the importance of diagramming when disassembling a
computer.
• Be able to disassemble and reassemble a computer.
3. Disassembly Overview
• Seldom is it necessary to completely disassemble a computer, however
when a technician is first learning microcomputers, it can be both very
informative and fun.
• Sometimes disassembly is accomplished to perform a preventive
maintenance cleaning.
• Other instances where disassembly is helpful is in diagnosing a problem
of undetermined cause by removing components one by one or to
outside the case. It can also help with diagnosing grounding problems.
• Grounding – Occurs when motherboard or adapter isn’t properly
installed and a trace (metal line on the motherboard or adapter) touches
the computer frame and causes the adapter or other components to stop
working.
4. Electrostatic Discharge (ESD)
• ESD (ElectroStatic Discharge) – Occurs when stored up static
electricity is discharged in an instantaneous surge of voltage. ESD
damage is nonrecoverable and the most susceptible components are the
CMOS and RAM chips.
• Anti-static Wrist Strap – A strap connecting the technician to the
computer and that equalizes the voltage potential between the two to
prevent ESD. It is connected to a grounding post or a metal component
such as the power supply. Electronic symbol for ground is:
• Warning: A technician should NEVER wear an ESD wrist strap when
working inside a monitor because of high voltages!
6. EMI (Electromagnetic Interference)
• EMI (ElectroMagnetic Interference) – also called EMR
(ElectroMagnetic Radiation) is noise caused by electrical devices. Can
travel through electrical wires.
• RFI (Radio Frequency Interference) – Noises that occur in the radio
frequency range.
• Always replace the slot covers for expansion slots that are not being
used. This will keep out dust and improve the airflow inside the
computer.
7. Tools
Having the proper tools to disassemble the computer can make the task
easier and prevent damage to computer components.
8. Reassembly
• Reassembly is easily accomplished if the user is careful and diagrams
properly during disassembly. Exercise care and reinstall all components
to their original location.
• Three major reassembly components are :
– Motherboards: have plastic connectors on the bottom called
standoffs.
– Cables
– Connectors
• Standoffs – Plastic connectors on the bottom side of a motherboard that
attach it to the case and prevent it from being in contact with the metal of
the computer case.
9. Cables and Connectors
• Keyed – A connector or cable that has an extra metal piece that allows
correct connections.
• Pin 1 – Pin 1 on a cable should be connected to Pin 1 on the connector.
The colored stripe on the edge of the cable identifies Pin 1 on the cable.
– Pin 1 on an adapter will be stenciled beside the connector.
• Solder Joints – Solder connections on the back of motherboards and
adapters. Pin 1 solder joints on the back of connectors are square.
• Hot wire – Brings AC current from the power supply to the PC’s front
panel.
• Return wire – Returns AC current from the PC’s front panel to the power
supply.
15. Hard Drives
• Hard drives must be handled carefully during disassembly because of
the delicate nature of their very intricate construction.
– The read/write heads are located only millimeters from the platter
storing all the data. A small jolt can cause them to make contact with
the platter and cause permanent physical damage.
– Older hard drives had utility programs to park, or lock, the heads in
place away from the platters when not in use.
• Self-Parking Heads – Hard drives that have read/write heads which pull
away automatically when the computer powers off. This feature still
would not prevent damaged caused by an accident or mishandling.
16. Preventive Maintenance
• Preventive Maintenance – Certain procedures performed to prolong the
life of the computer, such as cleaning the computer, drive heads,
keyboard keys, printers, and monitor screen.
• MSDS (Material Safety Data Sheets) – Sheets that contain information
about a product, its toxicity, storage, and disposal.