IT Essentials v8 (ITE v6.0 + v7.0) Chapter 7 Test Online

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To clean a laptop computer, mild substances and lint-free cloths are required. Cleaners should be nonabrasive. Otherwise they can damage the laptop components.

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Touchpads, fingerprint readers, and web cameras are common devices on modern laptops. An external monitor is an output device. While a PS/2 keyboard is an input device, it is not commonly used with laptops. An AC power connector provides a method to recharge the battery, but provides no data input to the laptop.?

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Laptop CPUs are designed to use less power and generate less heat than desktop CPUs.

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Routine preventive maintenance includes the cleaning of parts that can get dirty with everyday use. Internal components are not required to be cleaned as often as external parts. Nonabrasive cleaners should be used to ensure that no damage is caused to laptop components.

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Mobile devices commonly use Wi-Fi and cellular to connect to the internet. The cellular connection uses the cellular data network for a fee. The Wi-Fi connection uses an 802.11 wireless network in the area to connect to the internet.

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A dark screen on a laptop when the display is up and the laptop is powered on could happen because the laptop is in sleep mode. Tap a key to see if that is the case. If that does not work, remove the battery and AC power cord, then reinstall the battery and attach the power cord and try powering on again. The problem could also be a dirty or damaged screen cutoff switch. Use the repair manual to locate and clean or replace the switch.

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SRAM is not used for desktops or laptops as a RAM module, but as L1 cache inside the CPU. SIMMs were replaced by DIMMs on desktops as RAM modules.

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Laptop CPUs are designed to generate less heat and therefore require smaller cooling mechanisms than their desktop counterparts.

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SMTP is used to send mail from the client to the server but POP3 is used to download mail from the server to the client. HTTP and SNMP are protocols that are unrelated to email.

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Laptop motherboards are proprietary and vary based on the manufacturer. Laptop motherboards and desktop motherboards are designed differently and are not compatible. Components that are used on a desktop motherboard generally cannot be used on a laptop motherboard.

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The mobile hotspot setting is used to share an Internet connection on a mobile phone with other devices.

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The laptop lid commonly contains the screen, webcam, microphone, and Wi-Fi antenna.

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Digitizers are used in mobile device touchscreens. The digitizer converts user touch actions such as a swipe or tap into an input digital signal.

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Light-emitting diode (LED) displays use an LED backlight to illuminate pixels on the screen. In contrast, liquid crystal displays (LCDs) use either an LED or cold cathode fluorescent lamp (CCFL) backlight. Organic LEDs (OLEDs) do not use a backlight.

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A laptop webcam, microphone, and wireless antenna are commonly located in the top of the display.

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The Advanced Configuration and Power Interface (ACPI) standard provides support for power states that are very important to mobile devices such as laptops. S0 – The computer is on and CPU running. S1 – CPU and RAM have power, but unused devices are powered down. S2 – CPU is off; RAM is refreshed. S3 – CPU is off; RAM is set to a slow refresh rate. S4 – CPU and RAM are off (and RAM contents saved to a temp file). S5 – The computer is off.

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A flash card reader (sometimes simply called a card reader) accepts a variety of flash card types and commonly attaches to a USB port.

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Memory modules have a clip on either end that holds the SODIMM securely in the slot. Press outward on both clips to release the memory module from the slot.

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A field-replaceable unit (FRU), such as a motherboard, display, keyboard, or touchpad, commonly requires some technical skill to install. RAM and a battery are considered to be customer-replaceable units (CRUs).

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A replacement battery must meet or exceed the specifications of the mobile device manufacturer and have the same form factor.

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Virtual reality (VR) provides an immersive experience replacing the real world; augmented reality (AR) uses an overlay of digital elements into the real world. Headsets are commonly used with both VR and AR technologies.

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Cellular technology standards are 1G, 2G, 3G, 4G, LTE, and 5G. 5G technology supports speeds up to 20 Gbps and is more efficient.

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In order to configure two Bluetooth devices, the devices must connect to one another by pairing with one another. This may require a PIN or passkey as part of the process.

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iOS devices can synchronize apps, music, video or books using the iTunes app.

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The steps of the troubleshooting process are as follows: Identify the problem. Establish a theory of probable cause. Test the theory to determine the cause. Establish a plan of action to resolve the problem and implement the solution. Verify full system functionality and, if applicable, implement preventive measures. Document findings, actions, and outcomes. It is during step 4 that if no solution is achieved in the previous step that a technicians needs further research.