220-1202 Practice Question: A technician is replacing a damaged power supply…

Answer analysis

Option-by-option breakdown

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

• ✗

  Proceed with installing the new power supply and ignore the bulging capacitor.

  Why it's wrong here

  A bulging capacitor indicates internal failure, often due to excessive heat or voltage, leading to electrolyte leakage or rupture. Ignoring this critical component defect can result in system instability, unexpected shutdowns, or complete hardware failure, even with a new power supply. Furthermore, a failing capacitor can pose a fire hazard or damage other components on the motherboard due to improper voltage regulation or short circuits. This approach is irresponsible and unsafe, as it leaves a known, active hazard within the system.

• ✗

  Use a screwdriver to short the capacitor leads to discharge it.

  Why it's wrong here

  Directly shorting a charged capacitor with a metal object like a screwdriver is extremely dangerous and can cause a sudden, uncontrolled discharge. This action typically results in a loud pop, a bright spark, and potential damage to the screwdriver tip or the capacitor itself. More critically, it poses a significant risk of electrical shock or burns to the technician due to the rapid release of stored energy. Proper discharge requires a resistor to safely dissipate the charge over time or a specialized discharge tool, not a direct short.

• ✓

  Wear insulated gloves and carefully remove the motherboard for replacement.

  Why this is correct

  Wearing insulated gloves is a crucial safety measure when handling internal computer components, especially near potentially charged capacitors, as it protects against accidental electrical shock. A bulging capacitor signifies a severe defect in the motherboard's power delivery system, making the entire board unreliable and potentially dangerous. Replacing the entire motherboard is the most effective and safest solution because it completely eliminates the faulty component and its associated risks, ensuring system stability and preventing future issues. This approach prioritizes technician safety and system integrity.

• ✗

  Apply electrical tape over the bulging capacitor to contain it.

  Why it's wrong here

  Applying electrical tape over a bulging capacitor is a superficial and ineffective measure that does not address the underlying electrical or structural failure. The tape cannot neutralize the internal pressure or electrical charge, nor can it prevent the capacitor from leaking corrosive electrolyte or bursting. This action provides a false sense of security while leaving the system vulnerable to continued instability, potential short circuits, or further damage from the failing component. It fails to mitigate any of the inherent hazards of a defective capacitor.

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