How do I remove the parental lock from my Mitsubishi TV?

My mother has the parental lock on her TV. The only way to get it to go around the lock is by pressing QV and 9 at the same time. I don't know what the password is to remove the lock. Is there a standard password? She never placed the lock on, or passworded her TV.
Diane Campbell, December 2005
How do I remove the parental lock from my Mitsubishi TV?

Gabe, July 2008
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