220-801 Question #1149: Real Exam Question with Answer & Explanation

The correct answer is A: DC jack. The DC jack is the physical power port on the laptop where the adapter plugs in. If the adapter's green indicator light is on, the adapter itself is functioning. However, if the laptop still shows 'not plugged in,' the DC jack is likely damaged, loose, or broken - preventing powe

Question

A user reports that a laptop is turning on but the battery is not charging and the laptop power icon indicates it is not plugged in. The user inspects the power adapter; the green light is on and plugged into the laptop. Which of the following is the MOST likely cause of the issue?

Options

ADC jack
BCMOS battery
CLCD inverter
DFaulty battery

Explanation

The DC jack is the physical power port on the laptop where the adapter plugs in. If the adapter's green indicator light is on, the adapter itself is functioning. However, if the laptop still shows 'not plugged in,' the DC jack is likely damaged, loose, or broken - preventing power from being properly transferred from the adapter to the motherboard. A CMOS battery (B) powers BIOS settings and does not affect main battery charging. An LCD inverter (C) is related to screen backlighting, not power. A faulty battery (D) is possible but less likely than a broken DC jack when the OS does not even detect AC power.

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