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Unlock procedure and to override the password lock to many popular brand TVs are given.
If the Sony DVP-NS77H DVD player displays "TRAY LOCKED" and you can't
eject a disc or open the tray, try the following - First turn the unit
off. Then, while holding down the eject, play and stop buttons
simultaneously (on the front of the DVD player), turn the unit on with
the '/O button (also on the front of the player). This released the
locked tray for me.
You can lock the tray and prohibit the unwanted disc ejection. On the center unit ONLY: While the system is turned off • The system turns on and "LOCKED" appears on the display window. • If you try to eject the disc, "LOCKED" appears to indicate that the tray is locked. To cancel Carry out the same operation again. • The system turns on and "UNLOCKED" appears on the display window.
there is a small hole in the front of the tray that will accept a straightened paper-clip. gently insert the clip and the tray should release. if the cd/dvd disc is dislodged from being flat in the tray, it may not come out. you might need to open the cover and manipulate the disc to get it back flat in the tray. a good first test is to see if the disc plays. if it does, it is in the tray correctly and should be easily released with the paper clip. the try might work after you release it. another possible first try would be to gently push inward on the tray after telling it to release. if there is extra tension on the tray it could cause the mechanism to not release. freeing the tension on the tray could be all that you need to get the 'unlock' to release. (kinda like trying to open a door when someone is pushing it very hard against the lock mechanism. it wont be able to move). good luck mark