There are a number of possibilities here. What is happening is that the unit is attempting to read the disc and failing. The default message is "no disc" if it can not read the disc at all and wrong disc if some information is read but not understood. In either case, defective or dirty optics can cause this. Other electronic or mechanical problems can also cause this, but failing optics are the most common. There are a couple of things to try which will help to narrow this down.
1) Try playing a music CD. If that plays OK but a DVD will not, then the optics are likely failing.
2) Carefully open up the unit and clean the lens using a cotton swab and alcohol. Retry #1.
Sometimes the cleaning will resolve the problem. If not, then the optics need to be replaced.
Is this a cheaper-budget brand player? If so it could simple be a dead laser. The old cheap apex player were prone to that. They only cheap solution is to try a dvd laser cleaner. Possible accumulated dust etc is on the eye. Other than that it is probably best to pick up a new player. It's a throw away world these days.
Answers & Comments
There are a number of possibilities here. What is happening is that the unit is attempting to read the disc and failing. The default message is "no disc" if it can not read the disc at all and wrong disc if some information is read but not understood. In either case, defective or dirty optics can cause this. Other electronic or mechanical problems can also cause this, but failing optics are the most common. There are a couple of things to try which will help to narrow this down.
1) Try playing a music CD. If that plays OK but a DVD will not, then the optics are likely failing.
2) Carefully open up the unit and clean the lens using a cotton swab and alcohol. Retry #1.
Sometimes the cleaning will resolve the problem. If not, then the optics need to be replaced.
Dan
Is this a cheaper-budget brand player? If so it could simple be a dead laser. The old cheap apex player were prone to that. They only cheap solution is to try a dvd laser cleaner. Possible accumulated dust etc is on the eye. Other than that it is probably best to pick up a new player. It's a throw away world these days.