I had to disconnect my battery to do some work on my ignition, and after I reconnected the battery, my head unit is asking for the security code. I know the code, but I can't find my manual, and http://www.kenwoodusa.com is under renovation or something, so I can't look at the manual online. Does anyone know how to "enter" the code so that the unit will work?

 

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I tried putting the codes in a few times, and now the faceplate doesn't even fold down when I turn the ignition on