Lab - Install the Power Supply

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Open the Case and Install the Power Supply

Computer cases are produced in a variety of form factors. Form factors refer to the size and shape of the case.

Prepare the workspace before opening the computer case. You want adequate lighting, good ventilation, and a comfortable room temperature. The workbench or table should be accessible from all sides. Avoid cluttering the surface of the work area with tools and computer components. Place an antistatic mat on the table to help prevent physical and ESD damage to equipment. It is helpful to use small containers to hold screws and other parts as you remove them.
There are different methods for opening cases. To learn how to open a particular computer case, consult the user manual or manufacturer’s website. Most computer cases are opened in one of the following ways:

• The computer case cover is removed as one piece.

• The top and side panels of the case are removed.

• The top of the case is removed before the side panels can be removed.

• A latch is pulled to release the side panel, which can swing open.

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Computer Assembly

Introduction

Assembling computers is a large part of a technician’s job. As a technician, you must work in a logical, methodical manner when working with computer components. At times, you might have to determine whether a component for a customer’s computer needs to be upgraded or replaced. It is important that you develop advanced skills in installation procedures, troubleshooting techniques, and diagnostic methods. This chapter discusses the importance of component compatibility across hardware and software. It also covers the need for adequate system resources to efficiently run the customer’s hardware and software.

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example of onscreen form

Particulars of Legal Guardian (if child is not in parents’ care)

Please attach a photocopy of Certificate of Legal Guardianship.

Name		NRIC / FIN / Passport No.
Date of birth (dd/mm/yyyy)		Marital status	r Single r Married r Separated r Divorced r Widowed
Country of birth		Race
Citizenship		Religion
Highest academic qualification	r No formal education r Primary r Secondary r Postsecondary (A levels, Diploma, ITE) r Graduate / Postgraduate	Gross monthly income	r No income r $2500 and below r Above $2500
Occupation		Spoken language(s)
Contact no. (Home)		Contact no. (HP)
Email		Relationship to Child
Residential address (if different from child’s residential address)

Particulars of Siblings & Any Other Relatives Staying with the Child

Name	Relationship to Child	Date of birth / Age	Occupation	Monthly income (if applicable)

D. Parent Report

This section is for parents to provide information about their child. Referring agencies should assist parents in completing this section if necessary. The information will help the SPED school better understand the child’s strengths and needs and how to keep the child safe.

1.     What are your child’s strengths and interests?

2.     What is your child’s behaviour like on a typical day?

3.     What are some situations that may cause your child to be upset or distressed (e.g. changes to routines, unable to get what he or she wants, going to new places)? How often do they occur (e.g. once a day, 3 – 4 times a week)?

4.     What does your child do when he/she is upset or distressed? What are some of your child’s behaviors that may involve health and safety risks for your child or others (e.g. tendency to run away from school or house if unsupervised, injures self or others)?

5.     What do you do to help your child to calm down when he/she is upset or distressed?

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Network topology

Ø Network topology is the arrangement of the various elements (links, nodes, etc.) of a computer network

Ø In computer networking, topology refers to the layout of connected devices.

Network topological are categorized into the following basic types:

·         bus

·         ring

·         star

·         tree

·         mesh

v Bus Topology

Bus networks (not to be confused with the system bus of a computer) use a common backbone to connect all devices.

v Ring Topology

In a ring network, every device has exactly two neighbors for communication purposes. All messages travel through a ring in the same direction (either "clockwise" or "counterclockwise"). A failure in any cable or device breaks the loop and can take down the entire network.

v Star Topology

Many home networks use the star topology. A star network features a central connection point called a "hub node" that may be a network hub , switch or router .

v Tree Topology

Tree topologies integrate multiple star topologies together onto a bus. In its simplest form, only hub devices connect directly to the tree bus, and each hub functions as the root of a tree of devices.

v Mesh Topology

Mesh topologies involve the concept of routes. Unlike each of the previous topologies, messages sent on a mesh network can take any of several possible paths from source to destination.

Summary

Topologies remain an important part of network design theory. You can probably build a home or small business computer network without understanding the difference between a bus design and a star design, but becoming familiar with the standard topologies gives you a better understanding of important networking concepts like hubs, broadcasts, and routes.

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DHCP, Dynamic Host Control Protocol

Ø The Dynamic Host Configuration Protocol (DHCP) is a network service that enables host computers to be automatically assigned settings from a server as opposed to manually configuring each network host.

v Advantages of DHCP  Over Manual Configuration Methods

    Each computer gets its configuration from a "pool" of available numbers automatically for a specific time period

    Configuration information can be administered from a single point.

    Major network resource changes (e.g. a router changing address), requires only the DHCP server be updated with the new information, rather than every system.

NOTE THAT

      if you have the option to set-up your client machines automatically, please do, as it will save you time and a lot of headaches.

v Disadvantages of DHCP  Over Manual Configuration Methods

    For a network administrator this process can be time consuming.

    Problems can occur when manually setting up your client machines.

    The DHCP server can be a single point of failure in networking environments that only have one DHCP server.

NOTE THAT

      if you have the option to set-up your client machines automatically, please do, as it will save you time and a lot of headaches.

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