EOS 60D won't turn ON with memory card in slot

[maussie]

Hi there!

Help needed desperately else the camera is useless as I can use any card in the slot -formatted or not , with ML files, new card with different sizes. I can't get the camera ON unless I remove the card and take battery out and back in close battery door and memory door without card. Then I can switch on the camera. It seems that many has had same issues but I  have not find any solution.  Anyone out there that has a suggestion? Thanks in advance.