220-1201 Practice Question: That their iPhone 12 will not turn on after being…

Answer analysis

Option-by-option breakdown

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

• ✗

  The battery has expanded due to heat and disconnected from the logic board

  Why it's wrong here

  While extreme heat can cause lithium-ion battery swelling, known as thermal runaway, this typically requires prolonged, severe overheating or internal battery damage, rather than just general heat exposure leading to immediate device failure. Furthermore, a disconnected battery would prevent any power, but thermal shutdown is the primary, immediate protective response to high temperatures in a functioning device to prevent such issues.

• ✗

  The device's logic board has been permanently damaged by heat

  Why it's wrong here

  Permanent logic board damage from heat, such as solder reflow or component failure, is a severe outcome that usually occurs after prolonged exposure to temperatures exceeding design limits. Modern smartphones are engineered with multiple thermal sensors and protective mechanisms, like thermal shutdown, specifically to prevent such catastrophic and irreversible damage. Assuming immediate permanent damage overlooks these built-in safeguards.

• ✓

  The device entered a thermal shutdown state to protect internal components

  Why this is correct

  This is the most probable and intended protective behavior for modern smartphones. iPhones are equipped with sophisticated thermal management systems that utilize internal temperature sensors. When these sensors detect that critical components, such as the CPU, GPU, or battery, are approaching unsafe operating limits due to external heat or intensive usage, the operating system initiates an automatic shutdown to prevent irreversible hardware damage and ensure component longevity. Once cooled, the device should power on normally.

• ✗

  The power button is stuck due to heat expansion

  Why it's wrong here

  While extreme heat could theoretically cause materials to expand and potentially bind a physical button, this specific issue would typically manifest as the button being unresponsive to presses or constantly registering input, not a complete lack of device power. A stuck power button alone would not cause the entire device to cease functioning or prevent it from powering on after cooling, especially if the device was already on before the heat exposure. The primary protective response to overheating is a system-level shutdown.

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