What happens when you connect the camera to a monitor and use the camera to playback the video on the monitor?

What computer and media player is being used?

Is the camera new to you - if no, did it used to behave properly - and if yes, did you get it new, is it rented or did you buy it used?

Is the camcorder in full automatic mode or is in in any sort of manual mode? If manual, which items (i.e., iris/aperture, shutter speed, video gain, etc.) are in manual mode and what are their settings?

Is there any difference between capturing video outside in bright sunlight or capturing video in whatever environment you are reporting?

There may be more questions before we can actually get to suggesting resolutions.