I have DVP-NS508P .when i play the dvd then it is showing loading after some time the result is NO DISK

SOURCE: player won't play any disks only says CANNOT LOAD DISK

change the way you connect the dvd player to your tv

SOURCE: Dawoo DVD Player showing No Disk error

you have dirty lens, try to cleaning with 100% cotton buds. or you have damage laser eye, or broken flex ribbon wire, but first you have to do is to cleaning the lens with cotton buds.. if not reading after you clean the lens! change the laser eye and flex ribbon wire.

SOURCE: player won't play any disks only says CANNOT LOAD DISK

Open unit and blow off carefully on laser eye with dust can if not there is a good chance your laser and or spindle motor in laser assembly is bad .Easy to change out .part # 8-820-237-06 (comes with spindel motor) at www.sony.com in parts/acess section ..If you do decide to change yourself make sure you unsolder small dot of solder on laser before install ..This is shipped soldered for static reasons..goodluck

SOURCE: DVP-NS50P will not load DVD

the lense could be only dirty, try cleaning it first. i suggest do a manual cleaning if you can. open the top cover of the unit, remove the disk retainer and you will find the lense somewhere in the middle. use a cotton bud, use a little of alcohol, dampen a little only and wipe the lense in circular motion. then use new dry bud to dry it.

SOURCE: DVP-NS30 shows "CANNOT PLAY" message when DVD inserted

Follow this procedure to troubleshoot if the DVD player cannot read or play the inserted disc.

1. Ensure the inserted disc is compatible with the DVD player.IMPORTANT: Refer to the operating instructions supplied with the product for a list of compatible disc. Manuals are available online in the Manuals/Specs/Warranty section of the Sony® eSupport Web site.
   
2. Use a soft cloth to clean the disc.
3. Examine the disc for any cracks or scratches that might be interfering with playback.
4. Attempt to play another disc.NOTES:
   
   • If another disc plays in the DVD player, then the previous disc is faulty.
   • Some recordable discs may not play correctly because of the quality of the recording, the physical condition of the disc, or the characteristics of the recording device or authoring software used.
   
   
5. Remove the disc from the DVD player.
6. Turn off the DVD player.
7. Unplug the power cord of the DVD player from the AC outlet.
8. Let the DVD player remain without power for 1 minute.
9. Plug the power cord back into the AC outlet.
10. Turn on the DVD player.
11. Insert the disc into the DVD player.
12. Attempt to play the disc.