I had this camera for about 4 years. As usual, I place my charged battery when I want to use it. I did my normal checks and switch it off. About 30 mins later when I wanted to use it, the body was very hot and I was unable to switch it on. I removed the battery and the SD card to cool it down. But when I insert the batteries back it was unable to switch on. Can anyone advise me wad to do?