Try to more clearly explain the problem. I can not remove the password from the Pioneer AVIC-X850. Because the password contains the character "_" and enter it from the keyboard is impossible because it is not there. Tried to put Condi's but not one version no switches the devices to testmode. Maybe something you can run File Manager to delete the file SECURITY.DAT or overwrite it? Or maybe somehow repair Condi's HACKMODE for X850 ?