Use a pair of tweezers to pull the power supply cable straight out to disconnect the power supply unit from the motherboard.

Depending on the age of your console, this cable might be very firmly connected. If it feels stuck, don't pull on the cables themselves with much force.

Use your fingers to grab the white connector head, and wiggle or "walk" the connector out of its socket to disconnect it.

In extreme cases, you might need to use needle nose pliers to get a good grip on the connector.

Go slow: pulling on the cables themselves might rip them out of the connector.