aboombafoo

Hi all, I've just finished doing some maintenance to my car. Upon reconnecting the battery, I've realized that I can't remember the password. Can anyone help me reset the password? The unit is a pioneer avic-8200NEX. The unit has a sliding screen that covers the sdcard slot, so I took apart the unit to insert a SD card loaded with some "testmode" files, that didn't work. Any suggestions? thanks!