I just recently bought my Panasonic Hmc150 and i poped in a new sd but it says "check card" everytime. I even tryed formating the card on my computer and it still wont work. Then i tryed to format it through the cam but it wont let me. Do you guys think my sd card is broken?

Try with another card. If that works fine, then the one you are currently using might have a problem.

Also try cleaning the terminals by wiping them with a soft, dry cloth.

Thanks problem fixed.