2. home-theater
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Double line when watching dvd's-please help

Hi I have been getting a double black line (which is only visible against a light background)when watching dvd's. I have adjusted the round focus dial on the front of my projector, the sharpness control on both my projector and dvd player, but it doesn't make any difference. What could be causing this? Is there anything else I can adjust or do to correct this? Thanks!!
audio_file

Showing 2 responses by davehrab

davehrab's avatar
davehrab
380 posts
 
I have seen a similar artifact in a friends CRT set up. This was a very thin line running from the bottom of the screen to the top of the screen slowly. It turned out to be a ground loop problem. It seems this is the video equilivant to the hum we hear in the audio portion when cable tv boxes are not properly grounded. Just a thought, hope this helps.
Dave
davehrab's avatar
davehrab
380 posts
 
Another long shot. If your display device has a circut called a SCAN VELOCITY MODULATOR (in it's menu) turn it off. It can lead to excessive edge enhancement (outlining) and possibly the double line you are seeing. Why not contact a ISF calibration service and see if they can help.
Dave
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