Check the listing for details. PIONEER AVH-4000NEX PIONEER AVH4000NEX SOFTWARE ERROR SCREEN REBOOT FIX SD CARD. Condition: Open box. Listed at 53.50 USD. PLEASE READ EVERYTHING !!!!! DON'T BUY IF YOU ARE IMPATIENT AND HAVE TENDENCY OF LEAVING NEGATIVE FEEDBACK WITHOUT GIVING REASONABLE TIME FOR HELP/ RESPONSE ........ PLEASE CONTACT US FIRST IF ANY ISSUES ARISE BEFORE OPENING A RETURN REQUEST. A LOT OF ISSUES CAN BE RESOLVED PRIOR TO REQUESTING A RETURN REQUEST.WE BLOCK BUYERS WHO INITIATE A REQUEST RETURN PRIOR TO CONTACTING US FIRST.WE ARE NOT SELLING ANY RADIO,THE LISTING IS FOR FIXING YOUR OWN DEFECTIVE UNITWE ARE OFFERING SD CARD THAT ONCE INSTALLED WILL FIX YOUR UNITIF YOU HAVE AVH-4000NEXTHAT KEEPS ON DISPLAYING SOFTWARE ERROR ON THE SCREEN JUST LIKE THE PICTURE SHOWS WE CAN HELP YOU REPAIR THE UNIT.AFTER YOU BUY THIS AUCTION WE WILL SEND YOU SD CARD THAT HAS THE OPERATING SOFTWARE.YOU WILL NEED TO KNOW HOW TO INSTALL THE SD CARD ON YOUR UNIT OR SEEK PROFESSIONAL HELP.THE FRONT PART THAT HAS LCD SCREEN AS WELL AS THE SURROUNDING BLACK BEZEL MUST BE REMOVED IN ORDER TO GET TO WHERE SD CARD IS LOCATED.PLEASE LET US KNOW IF YOU HAVE ANY QUESTIONS AND WE WILL BE HAPPY TO ANSWER THEM THE BEST WE CAN.THANK YOU