During routine operation and maintenance, an engineer found that all indicator lights of an AP were often off, which meant that the AP was not started and the power supply problem should be checked.

Question

Options

• ATrue
• BFalse

• A
  77% (20)
• B
  23% (6)

Explanation

Option A is correct because when all indicator lights on an AP are simultaneously off, it is a strong signal that the device has not powered on at all - a partial light pattern would suggest a different fault. Power supply issues (failed PoE injector, dead power adapter, tripped circuit, or faulty switch port) are the most common cause of a completely dark AP, making it the logical first checkpoint in troubleshooting.

Option B is wrong because ruling out a power problem when zero lights are illuminated would skip the most fundamental layer of the OSI/physical troubleshooting hierarchy, potentially wasting time diagnosing software or configuration issues on a device that never booted.

Memory tip: Think "no lights = no life." An AP with any power will always light at least one LED during boot. All lights off = treat it like an unplugged device - check the outlet, PoE source, and cables before anything else.

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