I bought the adapter with 2 [DELOCK Kabel USB Power> DC Plug 5,4mm]. My Panasonic TX-P46GT30E has 3 USB ports, as I refer to her power. The power supplies refined-made, the connector is replaceable and it fits well into any electrical outlet, so are not strictly necessary. A converter for the TV itself and one for the computer. Thanks to fiber optics belong to the past Brumschleifen ... That's why I have a motherboard with TOS Link connector.
The cable [] there is on amazon and serve their purpose.