A user reported that a laptop would no longer turn on after the battery was depleted, even though laptop was charged the night before. An on-site technician was dispatched with a spare laptop and veri

A swollen battery often indicates internal damage or a fault, which can prevent the laptop from powering on or holding a charge, even with a working AC adapter. This is a critical safety issue and a common cause of power failure in older or heavily used laptops.

Calibration corruption relates to inaccurate battery charge readings but doesn't typically prevent a laptop from turning on at all, especially with a verified functional AC adapter.

Excessive wattage would typically come from an incompatible charger and could damage components, but the technician verified the AC adapter was functional, implying it was appropriate.

A damaged port is less likely given the AC adapter was verified functional; a swollen battery is a more probable internal component failure preventing the laptop from powering on.