Loud buzzing. No start.
I also think your battery has failed you. My Jeep Grand Cherokee acted similarly 2 months ago and it was the 4 year old Die Hard that had failed. That was the second Die Hard that failed in it in 5 years! I replaced it with a premium Interstate battery as the Jeep is my mainstay in the winter and must be dependable. Have your present battery load tested and replace it if it fails. Remember that unused lead acid batteries sulphate and fail more often than one in-use--or that has been my experience.
Jim