Computer & Mobile Phone Repairs

Question 1

What is the definition of assembly in the context of computer and mobile phone hardware?

Accepted Answer

Assembly is the process of putting together individual hardware components to form a complete, functional system.

Question 2

What is the definition of disassembly in the context of computer and mobile phone hardware?

Accepted Answer

Disassembly is the systematic process of taking apart a computer or mobile phone system into its individual hardware components.

Question 3

Understanding assembly and disassembly processes is fundamental for hardware maintenance and repair because it allows technicians to:

Accepted Answer

All of the above: access internal parts, replace damaged components, and upgrade systems safely.

Question 4

Which specialized tool is used to loosen and tighten screws holding the device chassis and internal components?

Accepted Answer

Screwdrivers are essential for manipulating screws of various types and sizes in electronic devices.

Question 5

An electronic measuring instrument used to test voltage, resistance, and continuity in circuits to identify broken connections or faulty components is called a:

Accepted Answer

A multimeter is a versatile tool for diagnosing electrical issues.

Question 6

What safety equipment is worn on the wrist to ground the technician and prevent electrostatic discharge (ESD) from damaging sensitive microchips?

Accepted Answer

An anti-static wrist strap is crucial for preventing ESD damage.

Question 7

What is the crucial first step when disassembling a desktop computer safely?

Accepted Answer

The first step is to shut down the computer, turn off the power switch, and unplug all external cables.

Question 8

When assembling a desktop computer, which component should typically be installed onto the motherboard *before* placing the motherboard into the computer case?

Accepted Answer

The processor (CPU) and its heatsink/fan assembly are usually installed on the motherboard before it's mounted in the case.

Question 9

What is the initial step when disassembling a mobile phone?

Accepted Answer

The initial step is to power off the mobile phone and remove the SIM card tray and memory card holder.

Question 10

After cleaning the phone frame thoroughly to remove old adhesive residue, what is the next step when assembling a mobile phone screen?

Accepted Answer

The next step is to apply new adhesive tape or liquid adhesive along the edges of the frame.

Question 11

Looking closely at components for signs of damage like burnt chips, leaking capacitors, or corrosion from liquid spills is an example of which inspection technique?

Accepted Answer

This is an example of visual inspection.

Question 12

Which testing technique uses a multimeter set to continuity mode to check if a wire, ribbon cable, or circuit track is broken by detecting a complete path?

Accepted Answer

Continuity testing is used to check for broken paths in circuits.

Question 13

No sound output, distorted or crackling sound, or very low volume even at maximum settings are common symptoms of a faulty:

Accepted Answer

These symptoms typically indicate a faulty speaker.

Question 14

Cracked glass, a black screen with backlight on, vertical or horizontal lines, or a bleeding ink effect are common symptoms of a faulty:

Accepted Answer

These are classic signs of a damaged screen (display).

Question 15

What chemical cleaning agent is recommended for gently cleaning the black conductive carbon pads on the underside of a faulty keypad's rubber membrane?

Accepted Answer

Isopropyl alcohol (99% concentration) is recommended for cleaning keypad contacts.

Question 16

When using a multimeter to test a speaker, what does a reading of infinity (open circuit) typically indicate?

Accepted Answer

An infinite resistance reading usually indicates a blown speaker coil.

Question 17

What is the first crucial step when replacing a damaged mobile phone screen?

Accepted Answer

The first crucial step is to power off the device and disconnect the battery.

Question 18

After repairing a keypad, what functional test should be performed to ensure all keys register correctly?

Accepted Answer

Open a text editor or diagnostic software and press every key systematically.

Question 19

After replacing a mobile phone screen, what should a technician inspect for during the display and touch test?

Accepted Answer

The technician should inspect for uniform brightness, correct color reproduction, absence of lines or dead pixels, and touch responsiveness across the entire surface.

Question 20

Why is it important to disconnect the battery before replacing a mobile phone screen?

Accepted Answer

It is important to disconnect the battery to prevent electrical short circuits.

Strong work.

Leave this flashcard session?