USB-C Laptop Charging Input: Open input protection fuse | Auckland
Pattern to record: Adapter voltage reaches the board side of the connector but not the protected rail.
Identify the input design
Identify which USB-C ports on this laptop actually accept charging. A data-only USB-C port and a charge-capable port can look alike, and the charger and cable must support the laptop’s required power level. One possible explanation is that the sacrificial fuse has interrupted power after an overload or downstream short.
Stop before further damage
Remove debris without metal tools and do not force a loose USB-C plug. Bypassing a fuse removes an important fire and board-damage safeguard.
Workshop checks
- Test a known compatible PD charger and cable in both orientations, then separate connector damage from negotiation and board faults.
- Test the fuse electrically and check the downstream rail for a short before replacing it.
Repair and power verification
If the checks support this cause, repair the cause of overcurrent, then fit the correct rated protection component. Verification should cover both orientations, supported power levels, sleep, battery transition and sustained charging.
For an assessment of your USB-C laptop, contact AEPC in Burswood or call 027 908 8880. Provide the model and the conditions that reproduce this problem. Workshop visits are by appointment.