The video is a bit sucky. I use the pressure method a lot with clients machines. Identify the pixel (often black or white are hard to get back, but pixels on/off are easy. Take a folded tissue. Turn ON the machine for a minute or to and place a dot with an erasable marker on the point. Turn the machine OFF and apply pressure with the tissue and give it a tiny tiny rub under pressure. Sometimes you might have to do it a couple of times.
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