A:Answer The One Connect box appears to function as everything-but-the-screen. It's the power supply, the brain, and the I/O. So, yeah, you would still need it as it runs a single cable to the TV panel that is likely proprietary for Samsung and must carry all signals and data. Pretty slick to me, as an IT professional, since it would make problems and repair/troubleshooting simpler to just send in the box instead of the whole TV when all signs point to anything but the panel having issues. Sorry if more info than needed.