Try switching memory card. I find that if i have certain types of files on the sd card the camera doesnt fully turn on. Ive found that if i also use the sd card in other camera types as well that issue happens
TCampbell that was amazing advice and IT WORKS!!!! My T3I stop functioning 2 days ago with all the symptoms describe by the other post. I was also ready to and buy a new camera, HOWEVER YOUR ADVICE ABOUT THE USING MEMORY CARD IN NIKON AND CANNON PROD...
