Chapter 3: Computer Assembly--Step By Step

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Key Terms

Electrostatic discharged (ESD)

Static electricity is the buildup of an electric charge restingon a surface. This buildup may jump to a component and cause damage. Can be destructive to to the eleectronics in a computer system.

Power supply

converts AC power from the wall outlet into the lower voltages of DC power required to power all components of the computer

Motherboard

a circuit board that contains all of the computer system's main components.

Central processing unit (CPU)

also known as the microprocessor; the brains of the computer

Zero insertion force (ZIF) socket

refers to the amount of force needed to install a CPU into the motherboard socket or slot

Thermal compund

helps to conduct heat away from the CPU

Isopropyl alcohol

an acceptable substance used to wipe down areas to help keep them as clean as possible

Heat sink/fan assembly

It is a two-part cooling device. The heat sink draws heat away from the CPU. The fan moves the heat away from the heat sink. The heat sink/fan assembly usually has a 3-pin power connector.

Random-access memory (RAM)

is the temporary storage for data and programs that are being accessed by the CPU.

Volatile memory

RAM is volatile memory, which means its that the content is erased when the computer is powered off.

Hard disk drive (HDD)

is a magnetic storage device that is installed inside the computer. Is used as permanent storage for data.

Optical drive

is a storage device that uses lasers to read data on the optical media.

Floppy disk drive (FDD)

is a storage device that uses removable 3.5-inch floppy disks.

Molex power connector

provides the optical drive with power from the power supply.

Berg power connector

provides the FDD with power from the power supply.

Adapter card

are installed to add functionality to a computer

Network interface card (NIC)

enables a computer to connect to a network.

Video adapter card

is the interface between a computer and a display monitor.

Advanced Technology Extended (ATX)

main power connector will have either 20 or 24 pins.

Serial advanced technology attachment (SATA) power connector

are used to connect to hard disk drives, optical drives, or any devices that have a SATA power socket.

Parallel advanced technology attachment (PATA) data cable

can have either 40 or 80 conductors. Usually has three 40-pin connectors. One connector at the end of the cable connects to the motherboard. The other two connects to the drives.

SATA data cable

a 7-pin connector. One end of the cable is connected to the motherboard. The other end is connected to any drive that has a SATA data connector.

Basic input/output system (BIOS)

performs a check on all of the internal compnents. This check is called a power-on self test (POST)

Beep code

Audible reporting system for errors that are found by the BIOS during the POST, represented by a series of beeps.

Complementary metal-oxide semiconductor (CMOS)

The BIOS contains a setup program used to configure settings for hardware devices. The configuration data is saved to a special memory chip, CMOS.

A technician is installing a new power supply in a computer. Which type of power connector should be used to connect to a CD-ROM?

a. Berg
b. Mini-Molex
c. Molex
d. 20-pin ATX connector

c. Molex

A technician is installing a new power supply in a computer. Which type of power connector should be used to connect to an ATX motherboard.

a. Berg
b. Mini-Molex
c. Molex
d. 20-pin connector

d. 20-pin connector

When a technician installs a new CPU, what will help maintain even contact and heat distribution between the CPU and heat sink?

a. Silicon spray
b. Graphite paste
c. Glue
d. Thermal compound

d. Thermal compund

When installing a CPU in a ZIF socket, how should the technician align the pins to avoid damage?

a. Pin 1 is always aligned with the corner opposite the base of the lever.
b. Pin 1 on the CPU is aligned with Pin 1 on the ZIF socket.
c. Pin 1 is aligned with the corner closest to the memory.
d. The removed corner of the CPU is always aligned with the corner opposite Pin 1.

b. Pin 1 on the CPU is aligned with Pin 1 on the ZIF socket.

A technician is installing additional memory in a computer. How can the technician guarantee that the memory is correctly aligned?

a. The label on the memory module should always face the CPU.
b. A notch in the memory module should be aligned with a notch in the slot on the motherboard.
c. The arrows on the memory module should be aligned with the arrows on the motherboard slot.
d. All memory and motherboard slots are color-coded, with one red end and one blue end.

b. A notch in the memory module should be aligned with a notch in the slot on the motherboard.

When mounting a motherboard in a computer case, what does the technician use to prevent the motherboard from touching the bottom of the case?

a. Standoffs
b. Ground-fault isolators
c. Silicon spray
d. Grounding straps

a. Standoffs

When installing adapter cards in a computer, how should a technician properly secure the card?

a. Install the card, and attach it to the expansion slot using thermal paste.
b. Install the card, and attach it to the motherboard using thermal pads.
c. Install the cord, and secure it using metal retaining clips located on the expansion slot.
d. Install the card, and secure it to the case with a screw. Or, if the case provides plastic or metal clips, use them.

d. Install the card, and secure it to the case with a screw. Or, if the case provides plastic or metal clips, use them.

Which two connectors are used to connect external peripherals?

a. EIDE
b. Molex
c. PATA
d. PS/2
e. USB

d. PS/2
e. USB

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