If the camera is correctly connected to the recording medium, and it has power, the most common problems you might encounter will be those relating to video quality. These issues tend to be caused by the physical location or by maintenance-related issues.
Lens Problems
Clean the lens with a soft cloth--use the same kind you'd use for eyeglasses. This will remove dust and dirt which can cause fuzzy images. Other fuzzy image problems can be caused by dirty glass if the camera is pointing out of the window. Focus the lens if you can. Make sure you're not stretching the lens's limitations--focusing under 3 feet will likely need a special lens.
Image Problems
The number-one trouble item is video being too dark or too light. Make sure the camera has enough light. Make sure that if you've got the camera working in an environment where there is changeable light, you've set the camera to an auto brightness setting. If you can't see images in low light you can increase the lighting of your scene. Don't place the camera in a dark spot and have it record very light scenes. It will confuse the sensor.
Detail Problems
If you can't see enough detail, clean the lens and focus the camera. If that doesn't work, try different resolutions, different camera bit rates or play with the scene lighting.
Video Lag
This can be an issue with the processor speed on the computer; it also can be a wiring issue. You may need to rewire your installation. Try the camera at the computer to bypass the wiring and see if that helps. Reboot the computer and reduce the number of programs running.
Video Skips and Jumps
Make sure your computer meets the requirements for the camera. You can try reducing the video quality and the frames per second (FPS). Try reducing the number of running programs and try moving the camera closer to the computer to check for wiring problems.
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