Problem - x100 blue pictures - help

I just picked up (24 hours ago), a used x100. Luckily, I have the option of returning same but the problem may be me (or settings), not the camera. I took 40 pictures this afternoon. Thirty-five have turned out with a distinct blue/purple cast to the entire picture. I alternated between jpgs and raw with no difference in the 35 blue ones. I'm I doing something wrong or is it time to return the camera? Signed, x100 newbie.