The camera is not reading my memory card when inserted.

Try restarting the camera. If this doesn't resolve the issue grit or other physical obstruction may be blocking the shutter. Use compressed air or a hair dryer on the cool setting to clear the obstruction. If this doesn't resolve the issue or if there is damage to the lens, replace the lens. Also check out the full Troubleshooting Guide.

Check the camera settings and make sure the flash is turned on, and that the battery is fully charged. If this doesn't resolve the issue, the flash unit is likely faulty. Replace the flash. Also check out the full Troubleshooting Guide.