Doesn't seem to see disc. reporst disc error.

The first step is to clean the lens with a cotton swab and alcohol if you can get to it. If you hear the disc spin, then either the optics are failing or the spindle motor (makes the CD spin) is starting to fail and is not getting the disc up to speed in time. Either problem will result in the "no disc" error. If the cleaning does not resolve the problem, the optics will need to be replaced.

Dan

It is possible that you have a disc with a format that is not supported by your player. This can happen for many reasons. If your player will play a new standard DVD it is most likely the other disc that is the problem. Every player is different. Some new less expensive players will play almost any thing. A newer better quality player may not play as many formats. Besides the issue of format you can find security issues with either old discs or more likely an older player. Discs that are a problem more often are discs that have been burned copied or down loaded or produced by a company that uses a format that is not as widely used. The last problem is common with work out videos and generic movies / kids programs . You may also check to see if your player can except a software update.