T4i won't power up; tried 2 fully charged batteries and 2 sd cards

My Rebel t4i seems to have died after uploading photos yesterday. Tried 2 fully charged batteries and 2 cards. Checked the connections and it seems weird that the camera won't power on immediately after uploading photos.

The camera has a few power interlocks which will prevent the camera from powering up. One is on the battery door. One is on the SD card slot door. There may also be one that detects if the memory card is fully seated.
Can you remove and *carefully* re-insert the memory card to make sure it's fully seated and in the correct orientation. (label faces the back of the camera) and make sure the memory card slot door is able to close completely. Also make sure the battery door is able to close completely.
Also make sure the doors are not damaged in any way (typically the doors have a tiny tab which engages a micro-switch.)
Tim Campbell
5D II, 5D III, 60Da

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T4i won't power up; tried 2 fully charged batteries and 2 sd cards

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