Pattern to record: Power appears only at one plug angle and the centre contact feels abnormal.

Identify the input design

This guide applies to an all-in-one with an external low-voltage adapter. An all-in-one with a mains lead entering the chassis has a different power arrangement; identify the model before selecting an adapter or opening the display. One possible explanation is that the current-carrying pin is cracked internally or separated from its solder joint; this check applies only when the model actually uses a barrel connector with that contact arrangement.

Stop before further damage

All-in-one units may also contain mains-powered sections that require trained handling. Bridging a broken pin can create a direct short.

Workshop checks

1. Verify the specified adapter, inspect the input socket and compare behaviour at minimum and normal load.
2. Inspect the pin under magnification and check continuity without powering the device.

Repair and power verification

If the checks support this cause, replace the damaged jack or connector assembly with the exact supported part. Verification should cover cold start, display brightness, processor load, sleep and repeated restarts.

For an assessment of your all-in-one computer, contact AEPC in Burswood or call 027 908 8880. Provide the model and the conditions that reproduce this problem. Workshop visits are by appointment.