If the camera does not work when it is turned on, check to see if the battery is charged. Plug in the Camera and allow the battery to charge for a few minutes, then try to turn the device on.
If the camera still does not turn on, this could be a sign that you have a malfunctioning battery. If you have a malfunctioning battery, you can replace it using the Battery Replacement Guide for the device.
Source: [[Fujifilm X100T Troubleshooting#Section_Battery_is_faulty_malfunctioning]]