If it is happening to all disc including to those that previously work, maybe time to replace the player or get it repaired. However, you can try to use a lens cleaner first, or you can also try to disassemble the player if you can, then make sure the lens is properly aligned.
Answers & Comments
If it is happening to all disc including to those that previously work, maybe time to replace the player or get it repaired. However, you can try to use a lens cleaner first, or you can also try to disassemble the player if you can, then make sure the lens is properly aligned.