IT Essentials Chapter 4 Quiz Answers Online

Preventive maintenance helps reduce software and hardware problems by preventing undue wear on components, thereby extending the life of the components. It also assists in identifying failed components that require replacement, such as cooling fans.

Storage device problems are often related to loose or incorrect cable connections.

The steps of the troubleshooting process.
Step 1. Identify the problem.
Step 2. Establish a theory of probable cause.
Step 3. Test the theory to determine the cause.
Step 4. Establish a plan of action to resolve the problem and implement the solution.
Step 5. Verify full system functionality and, if applicable, implement preventive measures.
Step 6. Document findings, actions, and outcomes.

Hold the fan blades in place when you clean the inside of the computer with compressed air to prevent over-spinning the rotor or moving the fan in the wrong direction.

Some CPU settings such as speed and voltage can be changed through the system BIOS.

Always perform a backup before beginning any troubleshooting.

Spinning the fan blades with the power off, especially by using compressed air, can damage the fan. The best way to ensure the fan is working is to visually inspect it with the power on.

To remove dust inside a computer, use a can of compressed air.

A failing power supply could also cause a computer to reboot unexpectedly. If the power cord does not attach properly, then it is likely that the wrong type of power cord is being used.

Each light on the front of the case is powered by the motherboard through a cable that attaches somewhere on the board. If this cable comes loose, a particular light on the front of the case will not work.

After the repairs have been completed, continue the troubleshooting process by verifying full system functionality.

Once all repairs have been made, the last step of the troubleshooting process is to verify to the customer the problem and the solutions and demonstrate how the solution corrected the problem.

RAM problems are often caused by faulty RAM modules, loosely seated modules, an inadequate amount of RAM, and compatibility issues.

Once the cause of the problem is determined, a technician should research possible solutions, sometimes by visiting various web sites and consulting with manuals.

A burning electronics smell is often detected when a power supply is overloaded and damaged.

A technician should seek to determine the exact cause of a computer problem by testing theories of probable cause one at a time, beginning with the quickest and easiest to eliminate.