When ordering, you can see whether a Samsung TV requires a separate connection box (One Connect Box), usually in the product description or the technical details under "Connections" or "One Connect Box". Models with One Connect Box often do not have direct power and HDMI connections on the TV, but only a connection for the connection cable to the box.

The Samsung QE55QN90D has all connections (power, HDMI etc.) directly on the TV and does not require a separate connection box. It is powered directly and has four HDMI connections on the TV itself, without the need to connect an external box [product data].

Samsung Electronics GmbH
Hello,
if you are looking for a device where you can connect all cables directly to the TV, then the QE55QN90D is a good choice.
Best regards from Eschborn
Your Samsung Service Team