You are an IT support technician in a large office building. A user reports that their laptop intermittently stops charging whenever the computer is jostled or the power plug is moved. Which component is most likely defective?
CMOS battery
Laptop AC jack
Wall outlet at the user's desk
Laptop DC-in (power) jack
Laptops run on low-voltage direct current (DC). The external AC adapter converts the building's AC mains into the DC voltage the laptop needs and plugs into the laptop's DC-in (power) jack. If that jack becomes loose or its solder joints crack, moving the plug breaks the electrical connection and the battery stops charging. Replacing or re-soldering the DC-in jack resolves the issue. The CMOS battery only maintains firmware settings, the wall outlet would affect any device plugged into it, and laptops have no separate "AC jack."
Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
All IT & Cybersecurity Package plans include the following perks and exams .
Our pricing is simple. Full access to all certifications and exams in each package, for one price.
As many practice tests for as many topics as you want.
Use study mode non-stop, no limits.
Access to our AI assistant, Bash, trained to help you pass your exam.
Track your scores over time in study mode and report cards.
See how you improve over time, and where you need to focus.
Access our store with even bigger discounts than before.
Unlimited access to all performance questions and be prepared for the real thing.
All IT & Cybersecurity Package plans include unlimited access to the following study materials.
Create an account or sign in to access our study materials.