So out of nowhere I get the software error message on mu head unit. I have searched and searched with no luck on a fix. I cant send the unit back to pioneer cause I have no paperwork for the head unit. My question is this... Can I take the internal sd card that has the software on it out and replace it with a new one that has the firmware update on it? Im at a loss of what to do, can someone help point me in the right direction.