Will not play DVDs (no disc message on display),

Bluray uses a different laser than dvd/cd playback. You will need to have the deck replaced. Hope it's still under warranty.

Hey,

have you tried a lens cleaner? the lens may have gone bad and would need to be replaced. Do you have warranty on the player?

This problem is normal and exists with many CD/DVD drives.
On some of the drives, if you put in blank discs and try to open the disc in My Computer or Windows Explorer, Windows displays no contents or a blank disc. Whereas on other drives, you get the error message that you mentioned about incorrect function.

What software are you using to burn CDs or DVDs? Are you able to burn CDs but not DVDs or you can't burn both the discs? Did you try a CDs with a different make/manufacturer? Some drives refuse on some disc makes. Try another disc and another writing speed, or try the lowest writing speed available with your software.

Hope that helps,
Regards,
Raspal

Hi...
The laser goes thru a different lens arraignment for DVDs.
Take it to a TV shop and have them "blow out" the laser assembly with some CO2 and clean the lens.

how old is the player, it sounds like the lazer has gone down if it reads cds and not dvds

Hi ,
You should do...
1- clean to lens
2-change with new lens
3- change the spindle motor
I hope to fine it.

Did you try to clean lenses on laser head?

I called Samsung. They told me how to do a software reset and solve the problem
1. Take out all CDS.
2. Turn off and then on.
3. HOld down stop for 5 - seconds.

Problem Solved!

I had the same problem, don't try to hard it won't solve the problem. Just buy a new cheap one and it even will read more formats.

In response to your jvc-a75r DVD player, sometimes the solution might be less complex than it may appear. Had the same problem with my Samsung s321,the machine refused to read DVD's but would play CD's no problem. Simply opened up the cover(usually)4-6 small screws, and found my dog's hair inside of the player covering the laser eye.Electrostatic ionization attracts dust,etc. into the player remarkably well sometimes. Carefully used a cotton swap to remove debri. PLayerworked fine afterwards ...Good luck!