System Components
What is the main circuit board that connects all components of the computer?
Motherboard
What is the first step before assembling a PC?
Ensure workspace safety and use ESD protection
What does ESD stand for?
Electrostatic Discharge
The computer turns on, but there’s no display. What’s one possible cause?
Loose video cable or unseated RAM
Which key is commonly used to access BIOS/UEFI setup?
DEL or F2
This component stores data permanently, even when powered off.
Hard drive (HDD or SSD)
In what order should these components be installed: CPU, RAM, motherboard, power supply, case fans?
CPU → RAM → Motherboard → Power Supply → Case Fans
What should you do before replacing a power supply unit?
Disconnect power and verify the unit is unplugged
The system emits three beeps at startup. What does this typically indicate?
Memory (RAM) error
What Windows utility checks system hardware and displays error logs?
Device Manager or Event Viewer
What type of memory is volatile and erased when the PC is turned off?
RAM
What is the purpose of thermal paste when installing a CPU?
Improves heat transfer between CPU and heat sink
Name one software-based safety precaution before hardware maintenance.
Back up important data
The PC overheats frequently. What might be the cause?
Faulty fan, poor ventilation, or dried thermal paste
Which tool can be used to test system memory for errors?
Windows Memory Diagnostic or MemTest86
Which power supply connector is used for modern motherboards?
24-pin ATX connector
Which tool is most commonly used to fasten components inside a PC case?
Phillips screwdriver
Which tool can test power supply voltages?
Multimeter or PSU tester
After adding a new HDD, the BIOS doesn’t detect it. What should you check first?
Data and power connections
What software can check CPU temperature and fan speeds?
HWMonitor or SpeedFan
Identify the component responsible for performing calculations and logic operations.
CPU (Central Processing Unit)
Name two precautions to prevent static discharge damage.
Use an antistatic wrist strap and work on an ESD mat
What is the primary risk of working on a power supply while connected?
Electric shock
The PC powers on and off repeatedly. Name one likely cause.
Short circuit or failing power supply (PSU)
What command-line tool can verify system file integrity in Windows?
sfc /scannow