My webcam has suddenly begun to have a multicoloured screen with horrible resolution. There seems to be halos of colour around the items in frame and it is choppy. It was perfect days ago It is A Havit USB - 640x480 Cu 2001. We tried to adjust the lens itself ( it screws tighter or loose) this does a little for the sharpness, but nothing for the picture. Please Help if you can.
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