My T4i keeps saying no card in Camera.

[brandybeayon]

I have had my T4i less than a year now, about 3 months a go it went a couple days saying can "no card in Camera"  Then just as Suddenly it stopped and worked again..  Now  it is doing the same thing..  I have 3 different cards all worked yesterday non work today..  The cards are fine my othe camera reads them perfect as well as my computer..  Battery is Charged on camera completely..  what would cause this problem?

[jaygorzy]

As an update, I just received my T3i back from the Canon USA Factory Service Center.  As I suspected the SD memory cards were fine.  Service details stated that the SD circuit board was defective and malfunctioning; and was unreliably recognizing any memory cards.  The SD circuit board was replaced at no charge. 

[jaygorzy]

The Canon Service Dept seems satisfied that I have conducted all the diagnostics on this problem and have recommended sending out the camera for warranty repair.  Thanks again for your help.