Red indicator light on back of camera on all the time,

Red indicator light came on for no reason I can figure out. Battery is charged, sd card is not full. I didn’t drop it or hit it on anything, and I didn’t get it wet. Took the battery out and let sit all day but once I put the battery back in the red light comes back on. And it doesn’t matter if I have the camera on or off the red light stays on. I doesn’t go off when i take a photo or if I put my eye up to the camera. IT STAYS ON CONSTANTLY. Please help, what’s going on with my Fuji x100T?!