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The side beams are used for tracking and straddle the track which is being read. CDs are replicated through injection molding, where molten polycarbonate is injected into a mold under high pressure. Two approaches are taken with uncorrectable errors: interpolation and muting. Then, if you decide to have it professionally repaired, you will have a better chance of recognizing incompetence or down right dishonesty when dealing with the service technician.

In most cases, a cleaner disc is less effective than the methods above, and a low-quality disc could even cause more damage.[8] Try it if nothing else works, or skip to

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