220-1201 Practice Question: A customer reports that their desktop PC will not…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  CMOS battery

  Why it's wrong here

  The CMOS battery primarily supplies power to the Real-Time Clock (RTC) and maintains the BIOS/UEFI settings when the system is powered off or unplugged. A depleted battery would cause the system to lose its date, time, and custom BIOS configurations upon reboot, reverting to defaults. However, the battery's function is not integral to the initial power-on circuit, meaning the system would still attempt to power up, albeit with potentially incorrect settings.

• ✓

  Front panel header

  Why this is correct

  The front panel header on the motherboard provides the crucial connection points for the system's power button, reset button, and indicator LEDs. Specifically, the power switch pins must register a momentary circuit closure to signal the motherboard's power management unit to initiate the power-on sequence. If this connection is loose, incorrectly wired, or the button itself is faulty, the power-on signal will never reach the motherboard, resulting in a complete failure to power on.

• ✗

  Chipset heatsink

  Why it's wrong here

  The chipset heatsink is responsible for dissipating heat generated by the motherboard's chipset, which manages communication between various components like the CPU, RAM, and expansion slots. While an overheating chipset can lead to system instability, performance throttling, or even an automatic shutdown, these issues typically occur *after* the system has successfully powered on and begun operation. A faulty heatsink would not prevent the initial power-on sequence from starting, as the power delivery circuits are distinct from the thermal management of the chipset.

• ✗

  CPU socket

  Why it's wrong here

  A problem with the CPU socket, such as bent pins or an improperly seated processor, would fundamentally prevent the Central Processing Unit from functioning correctly. While this would inevitably lead to a 'no POST' scenario, where the system fails to display video or boot into an operating system, it generally does not prevent the initial power-on sequence. In such cases, the power supply would still deliver power to the motherboard, fans would typically spin up, and indicator lights might illuminate, but the system would not progress beyond the very early stages of startup.

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