I enter the password with the remote but the remote is missing

1. Check the Remote: Make sure you have the remote control for the projector.
2. Press the Menu Button: On the remote, press the "Menu" button.
3. Navigate to Security or System Lock: Use the arrow keys on the remote to navigate through the menu options. Look for a section related to "Security" or "System Lock."
4. Enter the Unlock Code: If you previously set a system lock code, you will need to enter it using the remote control. If you haven't set a code before, try the default code (often 0000 or 1234).
5. Disable System Lock: Once you've entered the correct code, navigate to the option to disable or unlock the system lock.
6. Confirm: Follow the on-screen instructions to confirm your choice, and the system lock should be disabled.

To bypass or reset the unlock code on your Optima Pro 1505 projector without a remote, you may try the following steps:

1. Turn on the projector and wait for the "Enter Password" prompt to appear.
2. Press the "Menu" button on the projector itself.
3. Navigate to the "Setup" or "Options" menu using the arrow buttons on the projector.
4. Look for an option called "Security" or "Password" and select it.
5. Depending on your projector model, you may need to enter a default password such as "1234" or "0000" to access the security settings.
6. Once you are in the security settings, look for an option to disable or reset the password.
7. Follow the on-screen instructions to disable or reset the password.

If none of these steps work, you may need to contact Optima customer support for further assistance.

Question edited for clarity.
Question edited.
English only on Fixya please!

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Reset instructions according to this
https://factory-reset.com/wiki/Optoma_Service_Menu
Optoma Service Menu Instructions Most of our Optoma Service Menu methods require the use of an original remote, typically you can not do it with just the buttons on the front of the set. If you no longer have your remote or have damaged it, we recommend that you purchase a Optoma Remote before trying to enter the service menu.
Method 1

1. Press simultaneously {UP} & {ENTER} buttons twice.
2. Press simultaneously {LEFT} & {ENTER} buttons twice.
3. A Service Menu will be displayed
   1. Then to access the Full Service Menu: Press the {UP}, {LEFT} & {DOWN} buttons once.
4. To exit, turn the Projector Off.

Method 2

1. Press the {UP} {UP} {LEFT} {LEFT} buttons.

Method 3

1. Press the {POWER} {LEFT} {LEFT} {MENU} buttons.

Method 4

1. Press simultaneously the {RE-SYNC} {ENTER} {SOURCE} buttons on the Projector.

Method 5

1. Press the {POWER} button.
2. It will show: "Power Off" or "Picture Mute".
3. Then press the {LEFT} button 8 times slowly.

Method 6

1. Press {MENU} {6} {1} {9} {MENU} buttons.
2. To exit the Service Menu: Press {MENU} {6} {1} {9}

Call the company or try ownr manual. Utube may hav answers

If you know the passcode you can put that in manually with the projector buttons.

Your problem same like me,just hold on the ENTER button 7 second and than press the SOURCE button,the projector will auto reset.

The default password is 1234

Disable password in Menu >> setup >> security
set Security << OFF >>
Here is a link to the manual as well
http://www.projector-manual.com/manuals/optoma/Optoma_EP721.pdf

Pass-code default value is "Right-Left-Down-Up" (first time).
any questions, feel free to ask me
have a nice day!
Jerry Lampdeng Limited

Manufacturers normally have a backdoor, a four digit password to gain access into their operating software when the user changes the password settings.

Optoma people told me their default PASSWORD is usually 2468 or 8642. One of the two will work to unlock access to full menu options.

Remember to rate my answer as you can now enjoy your projectors 100+ inches :)