Benq Projector MP625P Manuel D’Utilisation

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Operation
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If the password is incorrect, the password error message displays lasting for three 
seconds, and the message 'INPUT PASSWORD' displays for your retry. You can 
press Menu/Exit to cancel the change or try another password.
Though the password function is disabled, you need to keep the old password in hand should 
you ever need to re-activate the password function by entering the old password.