I'm having the same problem. Xbox one original. Power is on but wont start up. TV just shows no signal. The xbox logo on the console lights up. The fan is running. The light on the power brick on white. Tried switching ports on the TV. Also used the cable successfully with the xbox360. Tried multiple power bricks. Tried unplugging everything for a few hours. Tried holding in the eject and bind button. Tried different outlets. It's like it's not getting enough power? I've opened it up to clean it since Microsoft no longer services the original xb1 and didnt find much to clean really. Any ideas what could be wrong?