Can I fix dead areas on the screen, where lines don't appear?
I've got some old etch-a-sketches that have areas of the screen where lines disappear, or are so faint they are almost impossible to see. They have been sitting on a shelf for more than 15 years, being used only once or twice. We tried lots of shaking, turned the knobs, but nothing works. Any suggestions? I hate to throw them out.