What should be inspected if a notebook has a swollen battery?

When addressing a swollen battery in a notebook, prioritizing the safe removal and replacement of the battery is crucial. A swollen battery can indicate a malfunction, often due to factors such as overheating, aging, or manufacturing defects. If left unchecked, a swollen battery poses serious risks, including leakage, fire, or further damage to the notebook's internal components.

By safely removing the battery, technicians can prevent potential hazards and ensure the notebook continues to function safely. Following best practices involves turning off the device and disconnecting it from any power source before attempting to remove the battery. Replacement should be done with a compatible battery to restore proper functionality and safety.

The other options focus on inspecting different components of the notebook which, while important in general maintenance, do not directly address the immediate risk posed by a swollen battery. Ensuring the battery is handled properly takes precedence over checking the display, keyboard, or charging port in this situation.