Is it possible to use an Amazon Fire TV Stick without turning on the connected television?

 No, you can't use an Amazon Fire TV Stick without turning on the connected television. The Fire TV Stick is a small device that plugs into the HDMI port of your TV. It needs the TV to be on so it can display the content and allow you to navigate through apps and settings.

When the TV is off, there's no way to see or happening on the Fire TV Stick. The remote control for the Fire TV Stick works by sending commands to the device, but without the TV being on, you wouldn't be able to see what you're doing.

The Fire TV Stick relies entirely on the TV screen to show menus, apps, and videos. Even though the Stick itself stays plugged in and powered, it doesn't have its own display, so the TV must be turned on to use it.

In summary, the Fire TV Stick needs the TV to be on to work, as it doesn't have its own screen or way to show content without the TV.