Playstation 2 can't watch dvd because can't remember password for parental control

1. Insert a DVD Movie into the PlayStation®2.
2. You should receive a message informing you that the Parental Level has been set, and asking if youý"d like to allow the disc to play. Highlight "Yes" and then press the X button.
3. A new window will appear asking you to temporarily change the Parental Control to a different level. Again, highlight "Yes", and then press the X button.
4. Another window will appear asking you to enter your Password. Above that window are numbers (0-9).
5. Do not enter your password, but instead, press the select button on your Controller. This will change the text in the window from "Enter Password" to "Delete Password".
6. Using the numbers above the window, input 7444. If successful, you will receive a message stating "Deletion Complete".
7. Press Select. You will now be asked to register a new password. Please select a four-digit code of your choosing.
8. You will be asked to confirm your password selection by inputting the same code once again. If successful, you will receive a message stating "Registration Confirmed".
9. Now you need to turn off the password altogether. The movie should of started playing by now. Press select and chose Setup. Go to the parental control "tab" and set the level to "off".
10. Now you should be able to watch any movie

All credit for this write up goes to the member POST (revised by UnhappyKlown3). hope this helps please remember to vote

Found this on another site, from personal experience but its very well written so here you go.

The Playstation 2 is not only a video game system, but also a DVD player as well. In many families, the Playstation 2 serves as the "kids" DVD player, which means that many parents choose to take advantage of the parental lock feature to limit what kinds of movies the Playstation 2 will play back.
There could be instances where you entered in a parental code months ago, and now can't remember it. Or, you may have purchased a used Playstation 2, and you never knew the code to begin with. If you or the prior owner set a parental lock code, the Playstation 2 won't play back many movies without entering the code first. You could try to hunt down the original owners, or start inputting every code possible starting with 0000, but it's easier to reset the password and disable parental lock using a secret code.
Here is the procedure to reset the parental lock code:

1. Bring up a screen where the unit asks you to enter in the parental code. You can either insert a restricted disc, or enter the DVD setup menu and go to "parental control" under custom setup.
   
2. When the screen asks for the code, press the SELECT button, then enter in the code "7444".
   
3. The level adjustment under Parental Control dictates the strictness of the player. The lower the value, the more strict it will be. Either increase the value to lower the restriction, or disable the lock entirely by setting it to "off".
   
4. Once you have made your adjustments, be sure that the DVD tray is empty, and press the RESET button on the front of the Playstation 2. It is imperative the tray is clear of any DVD or game for the unit to save your settings.
   

A note for parents: If you're wondering what is stopping your child from using the above procedure to circumvent your rules, you can verify that they haven't reset the parental control very easily. Since the above procedure eliminates the old password entirely, all you need to do is see if your original password still works. If it does, they did not use the above procedure to break the rules. If it doesn't, they might be trying to pull the wool over your eyes.

Please rate accordingly

Justin

To reset the parental lock password or disable the parental lock, follow these easy steps

Step 1

Turn on your PS2 and choose the menu screen where you would normally enter the password. Instead of entering a password, go to the DVD setup menu. Go to "custom setup" and choose "parental controls".

Step 2

When you are asked for the code or password, press the select button on your controller and enter the number "7444". Now set the parental lock to "off".

Step 3

Press "reset" on the front of the game console to save your settings. When the system reboots, you should be able to view your previously censored games or DVDs. You will also have the opportunity to choose your own password, allowing you to turn the parental lock on and off, either manually or automatically by game or movie ratings.

Here it is better give me 5 stars for this one :)

Power off your PlayStation 2, and place a DVD into the disc drive. You can reset and turn off parental controls only through the DVD menu, not within the game menu.

Step 2 Start the DVD, and wait for the message informing you that the movie is classified as beyond the "Parental Control Level" and asking if you still want to play the movie. Select "Yes," and click "X."

Step 3 Click "Select" on the screen that prompts you to input your password. The screen will change to the "Delete Password" menu.

Step 4 Enter 7444 as your password, and then click "X." This is the override password and will result in the deletion of any previous passwords.

Step 5 Press "Select" to return to the password entry menu. Choose a four-digit number to enter as your new password. If you're going to disable parental controls for good, enter 0000, as this will be the easiest to remember and enter. Repeat the entry when it asks for confirmation.

Step 6 Click "Select" when the move begins to play. Use the directional pad to select "Setup" from the menu that appears. Next choose "Parental Controls." Change the level to "Off," and exit the menu. Your parental controls are now turned off.

-power on
-reset
-inset DVD R rated..(18 up only) when board comes up telling you parental control is on
-hit select
-it will say enter password
-hit select
-it will say delete password
-enter in 7444
-hit X

supply one you will remember, or write it down.

If this doesn't work only unplugging the playstation for 48-72 hours will clear this...

Actually its, 'select' then '7444', and all that does is reset the password.
Press the SELECT button and enter the 4-digit number "7444" whenever the Parental Control display asks you for your password. The old password is deleted.
You will then be prompted to enter a new password, enter whatever number you want, something like 0000, or a number that is easy to remember. If you wish to turn it off, just set it to off and forget about passwords.
Notes
- When you play DVDs which do not have the Parental Control function, playback cannot be limited on this player.
- If you do not set a password, you cannot change the settings for playback limitation.
- Depending on the DVD, you may be asked to change the parental control level while playing the disc. In this case, enter your password, the change the level. When you stop playing the DVD, the playback limitation level returns to the original setting.

After changing DVD settings:
To save your changes, be sure to eject the DVD before pressing the RESET button or turning off the unit with the MAIN POWER switch. Please note that changes will not be saved if you reset or turn off the console without first ejecting the DVD.
Sony Playstation 2 manual, pg. 19

Here is the procedure to reset the parental lock code:

1. Bring up a screen where the unit asks you to enter in the parental code. You can either insert a restricted disc, or enter the DVD setup menu and go to "parental control" under GA_googleFillSlot("TL-IMU-Article"); custom setup.
   
2. When the screen asks for the code, press the SELECT button, then enter in the code "7444".
   
3. The level adjustment under Parental Control dictates the strictness of the player. The lower the value, the more strict it will be. Either increase the value to lower the restriction, or disable the lock entirely by setting it to "off".
   
4. Once you have made your adjustments, be sure that the DVD tray is empty, and press the RESET button on the front of the Playstation 2. It is imperative the tray is clear of any DVD or game for the unit to save your settings.
   

A note for parents: If you're wondering what is stopping your child from using the above procedure to circumvent your rules, you can verify that they haven't reset the parental control very easily. Since the above procedure eliminates the old password entirely, all you need to do is see if your original password still works. If it does, they did not use the above procedure to break the rules. If it doesn't, they might be trying to pull the wool over your eyes.

http://www.techlore.com/article/10505/Resetting-Parental-Lock-Code-on-Playstation-2/

Here is the procedure to reset the parental lock code:

1. Bring up a screen where the unit asks you to enter in the parental code. You can either insert a restricted disc, or enter the DVD setup menu and go to "parental control" under custom setup.

2. When the screen asks for the code, press the SELECT button, then enter in the code "7444".

3. The level adjustment under Parental Control dictates the strictness of the player. The lower the value, the more strict it will be. Either increase the value to lower the restriction, or disable the lock entirely by setting it to "off".

4. Once you have made your adjustments, be sure that the DVD tray is empty, and press the RESET button on the front of the Playstation 2. It is imperative the tray is clear of any DVD or game for the unit to save your settings.

If you do not know the Parental Control password on your PS2 try the known defaults of 1111 and 7444.

This is the only way to turn "off" parental control lock on the custom setup screen.

1) turn off ps2 with no dvd in drive.
2) turn on ps2 and insert dvd in drive.
3) when it asks about parental password, choose 'yes'.
4) when prompted for password, press 'select'.
5) the prompt will change and say 'delete password'. enter '7444'.
6) enter a new password (0000 works).
7) registration complete, dvd will start playing.
8) once the movie starts, press 'select'.
9) click the 'stop' icon.
10) click the 'stop' icon again (the icon must be gray even when you have it highlighted).
11) navigate to 'custom setup' ('select', setup icon, custom setup icon)
12) move to parental control option, press right directional button, enter password (0000).
13) move down to 'level'.
14) move up to desired level (off is at the top).
15) click 'x'.
16) go back to 'select' menu options, and press 'play'.
17) while movie is playing, eject disk and remove dvd.
18) turn ps2 off using switch on the back, keep off for five seconds.
19) turn on ps2, put dvd back in.
20) happy dance. ;)