SOURCE: LG HDD DVD recorder RH7521W is not able to read
Mine had a similar problem. I assumed there might be some dust on the laser. I used an air compressor and pointed it at the DVD slot as it was opening and closing to blow some air around inside the unit (and hopefully dislodge any dust). It worked. The discs that would not play before did play after. I didn't have the air compressor nozzle too close to the opening as I didn't want to dislodge anything I wasn't supposed to. If it was dust on the laser, you might be able to clean it in other ways, such as removing the cover and using a cotton tip (take power off first!). That would have been my approach if I didn't have an air compressor.
SOURCE: My LG DR389 Recorder is
Hello,
A common reason for dvd players to give you error messages like "bad disc", "incorrect disc", "disc not readable", etc is that the optical lens needs to be cleaned. Dust will build up over time and prevent the device from reading the discs properly. Discs that are dirty and have finger smudges or if the discs have scratches will also cause these errors. There are some common mechanical problems that will also cause disc reading problems which you can find in my tips and tricks, just click on the link to read more about them.
TRY THE FOLLOWING STEPS FIRST:
You can clean your dvd player two ways, manually or by using a dvd cleaning disc. The following link will provide you with detailed information for doing cleaning the optical lens. I would suggest that you use the cleaning disc because it is easier and much faster. You can also clean your dvd discs themselves using the information here.
I hope that this information helps you solve the problem and you get many more years of use from your device. I wish you all the best. Please let me know if you need further assistance and I will do my very best to help you.
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