45. A customer is reporting that some of the keys at the bottom edge on a laptop are hard to press and the track pad buttons require significant force to click. The technician inspects the laptop and does not notice any cracks or other damage to the chassis or screen. Which of the following is the most likely cause of the issue?
Answer: C
The battery is swollen.
A swollen battery can cause physical pressure on the internal components of a laptop, leading to keys becoming hard to press and trackpad buttons requiring more force to click. This aligns with the technician's observation of no visible damage to the chassis or screen, indicating the issue is likely internal rather than external.
A) The customer dropped the laptop.
While dropping a laptop can cause physical damage, the technician found no visible cracks or other damage. If the laptop had been dropped, there would likely be signs of external damage, making this option less plausible.
B) The digitizer has failed.
A failed digitizer typically affects the touchscreen functionality rather than the mechanical keys or trackpad buttons. Since the issue reported is with the keys and trackpad, not the touchscreen, this option does not address the symptoms presented.
C) The battery is swollen.
Swelling of the battery is a common issue that can exert pressure on the laptop's internal components, causing keys to stick and making trackpad buttons difficult to press. This condition would not create any visible external damage, which aligns perfectly with the technician's findings.
D) An open bottle of rubbing alcohol fell onto the keyboard.
If rubbing alcohol had spilled on the keyboard, it could potentially cause short-circuiting or damage to the keys, but it would more likely lead to immediate malfunction or visible signs of liquid damage. The absence of such signs makes this option unlikely.
Conclusion
The most likely cause of the reported issues is a swollen battery, which can create pressure on the keyboard and trackpad without causing external damage. Other options either suggest external damage or relate to components that do not affect the described symptoms, reinforcing that swollen batteries are a common, insidious issue in laptops that align with the technician's observations.