There could be any number of problems. I am using a 10 transcend card 32gb and I don't have this problem.However, there are so many settings for this camera that it would be a setting issue, or your battery is getting low, etc. I suggest that you "google" this on the internet or write to the manufacturer. Someone will help you. Sorry, I am not able to help you with this particular issue. Iris
To be honest with you when I turn my camera on it takes around 4 seconds (I just turned it on and timed it). I have a 64 gig class 10 sandisk card and it works perfect. Got it on amazon for like 50 bucks. Switch cards and you will have no issue.