Mitsubishi 3515R , LOST LOCK CODE. My son had entered a lock code that he cannot remember, the

Question

My son had entered a lock code that he cannot remember, the manual instructed me to enter "QV" and 9, and it works, but I have to do it every time I turn on the TV. Is there a way to overide his code permantly so I can use my cable box univ. remote alone and not having to find my fact. remote each and every time?

frustrated and respectfuly submitted,

Steve