Please follow the procedure below: 1. While the message is displayed, press the center of the controller. 2. The LCD monitor and data panel will turn off . 3. Turn the Main Switch to OFF and remove the CompactFlash card from the camera. 4. If "No Card " message appears at next time the camera is activated in the recording mode, the camera and CompactFlash card are OK. 5. In case that "Card Error. OK" appears again, the CompactFlash card may be faulty. Use other card.