CompTIA 220-1101 Practice Test - Questions Answers, Page 55

The next troubleshooting step that the technician should attempt is to restart the smartphone. Restarting the smartphone can help resolve many common issues, such as battery drain, network utilization, app crashes, or performance slowdowns. Restarting the smartphone can do the following:

Clear the memory and cache of the smartphone, which can free up space and speed up the device.

Close any background apps or processes that may be consuming battery or network resources, such as syncing, updating, or streaming.

Reset the network settings and connections of the smartphone, which can improve the signal strength and quality.

Refresh the operating system and the user interface of the smartphone, which can fix any glitches or errors.

To restart the smartphone, the user can follow these steps:

Press and hold the power button of the smartphone until a menu appears on the screen.

Tap the option that says Restart, Reboot, or Power off and on.

Wait for the smartphone to turn off and then turn on again.

Enter the PIN, password, or pattern to unlock the smartphone.

Check the battery level and the network utilization of the smartphone.

If restarting the smartphone does not solve the problem, the technician may need to try other troubleshooting steps, such as updating the mobile OS, disabling Bluetooth, or connecting the smartphone to a Wi-Fi network. However, restarting the smartphone is usually the first and simplest step to try.

How to stop 'Mobile network standby' from draining my battery1

Battery life: Guide to everything that affects and drains your phone battery2

Mobile Network Standby Battery Drain; How To Fix It?3

Get the most life from your Android device's battery4

How to Fix Battery Drain from Mobile Network on Galaxy S235

The next step that the technician should do is to have the user unplug the heater. This is because the heater may be causing electromagnetic interference (EMI) or radio frequency interference (RFI) that affects the signal transmission between the computer and the monitor. EMI and RFI are types of noise or distortion that can degrade the quality or integrity of data signals, especially in analog connections such as VG

A) EMI and RFI can be generated by various sources, such as power lines, motors, fans, heaters, microwaves, radios, or cell phones. EMI and RFI can cause various symptoms on the monitor, such as flickering, ghosting, blurring, color shifting, or no display at all.

To troubleshoot EMI and RFI issues, the technician should follow these steps:

Identify the source of the interference. In this case, the heater is the most likely culprit, as it was added recently and is located close to the monitor or the cable.

Eliminate or reduce the interference. The technician should have the user unplug the heater or move it away from the monitor or the cable. The technician should also check if there are any other potential sources of interference nearby and remove or relocate them if possible.

Test the monitor. The technician should verify if the monitor is working properly after unplugging or moving the heater. If the monitor is still not working, the technician should try other troubleshooting steps, such as checking the display settings on the computer, ensuring the VGA cable is connected properly, or replacing the monitor.

How to Fix Monitor Flickering - CCM1

How to Fix a Flickering Laptop Screen - Lifewire2

How to Fix a Flickering Monitor - Techwalla3

How to Troubleshoot Display or Video Issues on a Monitor4

How to Troubleshoot a Monitor That Won't Turn On - Lifewire5

The most likely cause of the issue is a defective inverter. An inverter is a device that converts the direct current (DC) power from the laptop battery or adapter to the alternating current (AC) power that the LCD backlight bulb needs. The backlight bulb is a fluorescent lamp that illuminates the LCD screen and makes the image visible. If the inverter is defective, it may not provide enough power to the backlight bulb, or it may stop working intermittently. This can result in a dim, dark, or blank screen, even though the LCD panel is still functioning and displaying a faint image.

To troubleshoot a defective inverter, the technician can follow these steps:

Connect an external monitor to the laptop and check if the image is displayed normally. If the external monitor works fine, it means that the laptop video card and driver are not the cause of the issue.

Shine a flashlight into the LCD screen and look for a faint image. If the image is visible, it means that the LCD panel is not the cause of the issue.

Check the inverter cable and connector for any damage, loose connection, or corrosion. The inverter cable is a thin wire that runs from the laptop motherboard to the inverter board, which is usually located at the bottom of the LCD screen. The inverter connector is a small plug that connects the inverter cable to the inverter board. The technician can try to reseat the inverter cable and connector, or replace them if they are faulty.

Check the inverter board for any damage, burn marks, or blown fuses. The inverter board is a small circuit board that contains the inverter and other components. The technician can try to test the inverter board with a multimeter, or replace it if it is defective.

How to fix laptop screen flickering problem - Windows 101

How to Fix a Laptop Screen That's Flickering, Black, or Has Lines2

How to Fix a Dim Laptop Screen | Techwalla3

How to Test a Laptop Inverter | It Still Works4

How to Replace a Laptop Inverter Board | Chron.com5

The technician should check the wattage and the form factor of the power supply to ensure it will support the upgraded workstation. These are the two most important criteria for choosing a compatible and adequate power supply.

Wattage: The wattage of a power supply is the maximum amount of power it can deliver to the components of the workstation. The wattage of the power supply should match or exceed the total power consumption of the components, especially the new graphics card, which is usually the most power-hungry part. If the power supply does not have enough wattage, it may cause instability, crashes, or damage to the workstation.To estimate the power consumption of the components, the technician can use a power supply calculator tool, such as the ones found in the web search results123. The technician should also add some headroom to the wattage, such as 20% to 50%, to account for peak power consumption, future upgrades, or power supply degradation.

Form factor: The form factor of a power supply is the physical size and shape of the unit. The form factor of the power supply should fit in the case of the workstation and match the mounting holes and screws. The most common form factor for desktop power supplies is ATX, which measures 150 x 86 x 140 mm. However, some older or smaller workstations may use different form factors, such as SFX, TFX, or FlexATX. The technician should check the specifications of the workstation case and the power supply to ensure they have the same form factor.

Other criteria, such as efficiency rating, heat dissipation, fan type, and modular cabling, are not essential for supporting the upgraded workstation, but they may affect the performance, noise, or aesthetics of the power supply. The efficiency rating is the percentage of input power that is converted to output power, and it indicates how much power is wasted as heat. The heat dissipation is the ability of the power supply to cool itself and prevent overheating. The fan type is the design and size of the fan that cools the power supply, and it affects the noise level and airflow of the unit. The modular cabling is the feature that allows the user to detach unused cables from the power supply, and it helps to reduce clutter and improve airflow inside the case.

How to Choose the Right Power Supply for Your PC - Lifewire4

How to Choose a Power Supply: 7 Steps (with Pictures) - wikiHow5

How to pick the best PC power supply - PCWorld6

Power Supply Calculator -- PSU Wattage Calculator | Newegg1

Power Supply Calculator | Cooler Master2

Power Supply Calculator - PSU Calculator | OuterVision3

The best way to improve the efficiency of the process of formatting and reconfiguring a development PC after every application test is complete is to implement a sandbox. A sandbox is a virtual environment that isolates the application from the rest of the system, allowing the developer to test the application without affecting the main operating system, files, or settings. A sandbox can also be easily reset, deleted, or duplicated, saving the time and effort of formatting and reconfiguring the PC. A sandbox can also provide security benefits, such as preventing malware or bugs from spreading to the system or the network.

Other options, such as installing an SSD, disabling hyperthreading, or enabling hardware acceleration, may improve the performance of the PC, but they do not address the issue of formatting and reconfiguring the PC after each test. An SSD (solid state drive) is a storage device that uses flash memory instead of spinning disks, and it can offer faster data access, lower power consumption, and less noise and heat. Hyperthreading is a feature of some CPUs (central processing units) that allows each core to run two threads simultaneously, increasing the multitasking and parallel processing capabilities of the PC. Hardware acceleration is a technique that uses the GPU (graphics processing unit) or other specialized hardware to perform some tasks faster than the CPU, such as rendering graphics, video, or audio.

What is a Sandbox? | How Does a Sandbox Work?| Avast1

What is a Sandbox Environment?| Definition and FAQs2

How to Use a Sandbox to Test Software - Lifewire3

What is a Sandbox and How to Use One - Norton4

What is a Sandbox?- Definition from Techopedia5

The best way to protect the data of a virtual machine in the event of hardware failure is to use a cloud-based backup solution. A cloud-based backup solution is a service that copies and stores the data of a virtual machine to a remote server or storage device over the internet. A cloud-based backup solution can offer several benefits, such as:

High availability and reliability: A cloud-based backup solution can ensure that the data of a virtual machine is always accessible and recoverable, even if the hardware that hosts the virtual machine fails or is damaged. A cloud-based backup solution can also provide redundancy and fault tolerance, by replicating the data across multiple locations or regions.

Scalability and flexibility: A cloud-based backup solution can adapt to the changing needs and demands of the virtual machine, by allowing the user to adjust the backup frequency, retention period, and storage capacity. A cloud-based backup solution can also support different types of backup, such as full, incremental, or differential, depending on the user's preferences and requirements.

Cost-effectiveness and simplicity: A cloud-based backup solution can reduce the cost and complexity of maintaining a backup infrastructure, by eliminating the need to purchase, install, or manage hardware, software, or licenses. A cloud-based backup solution can also automate and streamline the backup process, by providing easy-to-use tools and interfaces, such as web portals, APIs, or scripts.

Other options, such as redundant hardware, UPS, or RAID, may improve the performance or resilience of the hardware that hosts the virtual machine, but they do not provide a complete protection for the data of the virtual machine in the event of hardware failure. Redundant hardware is a technique that uses multiple components or devices to perform the same function, so that if one fails, another can take over. UPS (uninterruptible power supply) is a device that provides backup power to a system in case of a power outage or surge. RAID (redundant array of independent disks) is a technology that combines multiple disks into a logical unit, to improve the speed, capacity, or reliability of the storage. However, these options may not prevent data loss or corruption due to other causes, such as human error, malware, or natural disasters. Therefore, a cloud-based backup solution is the best way to protect the data of a virtual machine in the event of hardware failure.

What is Cloud Backup?| Microsoft Azure1

Cloud Backup - What is it and how does it work?| Veeam2

Cloud Backup vs.Local Backup: Which Option is Right for You?3

An F-type connector is a coaxial RF connector that is commonly used for cable television, satellite television, and cable modems. An internet service provider (ISP) may use an F-type connector to connect the coaxial cable from the wall outlet to the cable modem or the set-top box. The F-type connector has a threaded interface that provides a secure and reliable connection. The F-type connector can also support high-frequency signals up to several GHz, which can deliver high-speed internet and high-definition television.

Other scenarios, such as making a serial connection to a hardware device, purchasing a charging cable for a laptop, or upgrading the service on an electrical panel, are not likely to use an F-type connector. A serial connection to a hardware device may use a DB-9 or a DB-25 connector, which are D-shaped connectors with pins. A charging cable for a laptop may use a USB or a barrel connector, which are flat or cylindrical connectors with contacts. An electrical panel may use a twist-lock or a pin-and-sleeve connector, which are round connectors with locking mechanisms.

F connector - Wikipedia1

F-Type Connectors - RF Connectors | Amphenol RF2

How to Install F Connectors on Coaxial Cable - The Spruce3