Charger or power-source trouble
A damaged or unsuitable charger can create misleading symptoms. Testing should use a known-good compatible power source without forcing a loose connection.
USB-C connector damage
Bent internal contacts, looseness, debris, or impact damage can prevent reliable connection. Repeated wiggling may worsen damaged pads or traces.
Battery and deep-discharge behavior
A heavily discharged battery may not respond immediately, but a system that stays hot, cycles, or shows no stable response needs evaluation rather than endless charging attempts.
Board-level power faults
The port is only one part of the charging path. Board components and power rails may need diagnosis, especially after impact, liquid exposure, or a failed previous repair.
Docking is another clue
Charging without docking, or docking without stable video, can help narrow the problem. Bring the dock and adapter only when the symptom depends on them.