idk if someone has already posted about this or not but when i have my vehicle off and turn the ignition on i press the map, menu, ejct and reset button for a few seconds and when it resets it goes black and goes to a blue screen saying enter password to unlock does anybody know the password

Yes don't play around in there. You have no reason to do so.

If you really want to read about it it's called service mode... Most things in there lead to bricking if you do the wrong things. Only purposeful use would be to upgrade wince