Pattern to record: Brown plastic, a hot-plastic smell or local discolouration surrounds the socket.

Stop before further damage

Stop using the mini PC and disconnect its supply from power if safe. Do not touch a hot or damaged connector, try another supply in that connector, or add USB devices to reproduce the heat. A fitting plug does not establish the correct voltage.

Identify the input design

Record the mini PC’s input specification before testing. Some models use a fixed-voltage DC adapter and others accept USB-C power; connected USB equipment can add load without changing the computer’s own workload. One possible explanation is that high resistance has generated enough heat to oxidise or deform the connection.

Workshop checks

1. With all power sources isolated according to the model’s service instructions, a technician should inspect both connector halves and the protected input for heat damage, loose contacts and shorts.
2. Identify whether the model needs a fixed-voltage adapter or USB-C power, and record attached USB equipment. Confirm supply and cable compatibility before planning later power tests.

Repair and power verification

Replace heat-damaged mating parts or assemblies as the model requires and correct the cause of poor contact. A burnt plug must not be reused with a new socket. Powered diagnosis is a professional step only after unpowered checks and any necessary repairs have established that it is safe. Using appropriate test equipment and the correct power supply, a qualified technician can then verify cold and warm start, USB load, network activity, sleep and sustained operation. Stop the test if abnormal heating returns.

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