Why should a technician avoid opening the casing of a power supply?
- Power supplies must always be replaced, not repaired.
- Hazardous levels of electricity may be present inside the power supply.
- Power supplies are very fragile, expensive, and easy to damage.
- Only the power supply manufacturer can open the casing of a power supply.
Explanation: Power supplies contain high voltage, and only highly-trained technicians should attempt to repair them. A power supply can still hold dangerous levels of electricity even after being disconnected from the mains power.
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