220-802 · Question #783
220-802 Question #783: Real Exam Question with Answer & Explanation
The correct answer is C: Power supply tester. When the power outlet, cable, and connections are all confirmed good but the system shows absolutely no signs of life (no fans, no lights, no POST), the next logical suspect is the Power Supply Unit (PSU). A power supply tester connects directly to the PSU's connectors and measur
Question
Options
- APunch down tool
- BPOST card
- CPower supply tester
- DLoopback plug
Explanation
When the power outlet, cable, and connections are all confirmed good but the system shows absolutely no signs of life (no fans, no lights, no POST), the next logical suspect is the Power Supply Unit (PSU). A power supply tester connects directly to the PSU's connectors and measures whether it is delivering the correct voltages (+12V, +5V, +3.3V, etc.). If the PSU is dead or out of spec, it would explain why nothing happens when the power button is pressed. The other tools are used for unrelated purposes: a punch down tool terminates network cables into patch panels or keystone jacks; a POST card is inserted into an expansion slot to capture and display POST (Power-On Self-Test) error codes, but requires the system to at least begin POSTing first; a loopback plug is used to test network interface ports for send/receive functionality. Since the system shows zero activity, a POST card would be useless here - you must first confirm the PSU is supplying power.
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