Turn off camera and connect via USB cable. Make sure the camera is charged sufficiently so that it doesn't shut off.

Turn on the camera and wait for the computer to recognize it as a new device. Explore the image files from the directory to make sure that the previous test shots you made are saving. If the pictures are there, then you know the camera works.

If there is no Memory Card, delete the photos from the DCIM file on your computer, and take more test shots. The camera has limited internal memory and might not capture shots if the memory is already full.