Disc won't play, display reads T25. - Sony DVP-NS501P Progressive-Scan DVD/CD Player : ** Now Your Chance Brand ** CD Player

You made need to get a c.d.cleaner,it's a disc and put into player to clean.Also clean the c.d. itself.https://www.amazon.com/s?k=cd+player+head+cleaner&gclid=CjwKCAjwpqCZBhAbEiwAa7pXedkZX0Ii3hGNIwiJH2plw_ifDp2KRI2OLL5O9Wj3d5wE0wP-SJDZMBoClbIQAvD_BwE&hvadid=616863275229&hvdev=c&hvlocphy=9011420&hvnetw=g&hvqmt=e&hvrand=11559832317325452860&hvtargid=kwd-3285951307&hydadcr=24632_13611814&tag=googhydr-20&ref=pd_sl_8fgthlymch_e

It sounds like buy your details, That i will compliment you on, Are to the point not like some other people asking questions on hear, That the lazer is shot, End not reading the info off of the disc any more, It is verry costly to have it repaired, Just look for a different one, I have got good used ones for friends of mine for $7 to $30 at the most, From thrift stores or privately, Hope this helps you out.

see the cause and remedies:
Does not play disc

1. No disc. - Load a disc into the tray.
2. Disc has been loaded upside down. Place the disc with the label side up.
3. Disc region code does not match region code of the player.
4. Disc type is not the correct type to play.
5. Disc is damaged or dirty. Clean the disc or try another.
6. Moisture may be condensed inside the unit. Remove the disc and the leave the power on for one or two hours.

Finally the OPU, optical pickup unit contain too the lasser beam, NOT are reading the TOC of disk,+Syscon can be defective. You must go to the repair shop TV for fix it. this a complex equipment.
see tje block diagram.
God bless you

The DVD laser pickup is at the end of life, replacement of assembly the only option, cheaper to replace the combo unit.

If you get a cannot read disc etc either you have a dirty or a bad optical pickup unit in the player--it reads the disc etc.

If bad cheaper to buy a new unit.

It has either a dirty or bad optical pickup unit (the part that reads the disc) and usually parts are not sold (only a complete DVD section if even available)

If not dirty may be cheaper just to replace the player itself.

The problem is in the laser pickup assembly, over time the laser becomes weak until it can no longer read the disc, but you can buy a DVD cleaning kit that might breath more life into the player, if no! cheaper to replace the DVD player.

Hello
If it does not play the cleaner disc, just inspect whether the disc inserted in spins inside it. You can check this by open the upper cover of the player, and inserting a disc into it. If inserted disc spins inside, and the player won't read it, the fault is with its laser pickup unit, and it should be replaced with same type and number.
If the disc dos not spins, the fault is with the sled motor [the motor that spins the inserted disc], has damaged, and should be replaced. OK.

probebly a bad laser. sometimes they will play music but not dvds or even the other way around. from what iv read this is happening to people in just a few weeks.

Have you tried a blank disc with "audio" or "music" marked on it? It won't record on data discs.