I was having the same problem as others have stated with a boot loop, or in my case, black screen a second or two after the initial splash NEX image. I tried everything listed in this forum to install a new SD card with firmware on it, but was continuing to get the black screen (tried 3 different SD cards and none worked). I finally fixed it and wanted to post the solution for others that have tried this fix and had no luck.
In addition to installing a new card with the firmware, I also had to install an SD card in the other slot that had the 1.02 update installed on it. This 2gb card was