SD card is only a storage device for data. It has no direct function other than storing pictures. Check your power supply, usually the batteries to see if you have full power. Make certain the batteries are in properly, aligned + to the + post etc.
Check to see if the settings are correct. If all of the above are in order, then the shutter control unit may have malfunctioned and thus Good Bye camera. Not worth the cost of repair.
Lastly, contact the manufacture and ask support for their opinion.