Pattern to record: Power is present but the Mac remains black or repeatedly enters recovery behaviour.

Use the correct Mac power design

Identify the Mac mini generation and its specified power connection. Recent models use a mains lead; older designs may use an external supply. The USB-C ports are not a substitute for the desktop’s power input. Startup firmware is incomplete or corrupted and normal boot cannot begin.

Power and data precautions

Mains-powered supplies contain hazardous sections and retained charge. A restore can erase data, so the selected recovery action must be understood first.

Model-specific checks

1. Verify the model-specific power lead or external supply, then separate power, startup and display-output stages.
2. Identify the Mac generation and follow its documented recovery procedure after confirming stable power; revive/restore procedures apply only to supported Apple-silicon or T2 models.

Repair and startup verification

If the checks support this cause, use the supported recovery action for that model, distinguishing a data-preserving revive from an erasing restore where those options exist. Verification should cover cold and warm start, all display outputs, USB load, sleep and sustained operation.

Reference: Apple support guidance.

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