Please define "everything". Have you tried a different HDMI cable? Tried a different port in the TV? Verified the Switch on a different TV? Do you see anything at all on the screen when the Switch is powered on?
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.