Chapter 5 A+ Disassembly and Power

Equipment Grounding

Equipment Grounding

When the motherboard or adapter is not properly installed and a trace touches the computer frame, causing the adapter and other components to stop working.

ESD (Electrostatic Discharge)

The difference of potential between two items that causes static electricity.

Antistatic Wrist Strap (ESD Strap)

The most common tactic to avoid ESD.

Antistatic Bag

Good for storing spare adapters and motherboards when parts are not in use.

Self-grounding

A method you can do yourself by touching the power supply.

EMI (electromagnetic interference)

Noised caused by electrical Devices.

RFI (radio frequency interference)

A specific type of electromagnetic interference that negatively affects computers.

Screw Driver

What tool is this?

Remove the powercord.

The first step in disassembling a computer is to...

Removing external cables.

The second step in disassembling a computer is...

I/O Shield

A part that allows for optimum airflow and grounding for the motherboard ports.

Standoffs

Allow the motherboard to be screwed into the case without the motherboard solder joints touching and grounding to the case.

Toner Vacuum

Used to clean computers and laser printers. Used to prevent the toner from melting and potentially damaging the vacuum cleaner.

Compressed Air

Used to remove dust in hard-to-reach places.

AC and DC

The two types of electricity are:

AC (Alternating Current)

The electricity provided by a wall outlet is...

DC (Direct Current)

The Electricity used by computer components is...

Voltage

A measure of the pressure pushing electrons through a circuit. Measured by VOLTS (V)

Multimeter Tool

Can be used to read voltage readings from power supply connectors and wall outlets.

Amps

Current is measured in...

Watts

Power is measured in...

Ohms

Resistance is measured in...

Continuity Check

Used to determine whether a wire has a break in it.

8-pin PCIe

PCIe video, connects to a PCIe video adapter.

4-pin Molex

Connects to Peripheral devices such as hard drives and CD/DVD drives.

24-pin Motherboard Connector

What cables are these?

ACPI (Advanced Configuration and Power Interface)

Gives the BIOS/UEFI and operating system control over various devices' power and modes of operation.

Wake on LAN

Allows a network administrator to control the power to a workstation remotely and directs the computer to come out of sleep mode.

Wake on Ring

Allows a computer to come out of sleep mode when a telephone line has a call.

Redundant power supply.

Some computers have a... That can be used if one power supply fails.

Modular power supply.

Comes with detachable cables.

Power Supply Tester

Can be used to check DC power levels on the different power supply connectors.

AC Circuit Tester

You can use a... If the wall outlet is suspect to be faulty.