I had the same problem with my AppRadio 4 (SPH-DA120) and found a new SD card with the image on eBay. If anyone is interested, here is a link to the one I bought: https://www.ebay.com/itm/Replacement-SD-card-for-the-AppRadio4-SPH-DA120-AVIC-5000NEX/162717730303
I opened up my unit and replaced the old SD card with the one that I bought. My unit is now working
EDIT December 2017:
BTW, I just saw the comments below after checking for a friend that had the same issue with his 7000. I was just trying to help out others by pointing out the method I used. I have no affiliation to the se