Using a Jig I get the following:
Firmware upgrade failed!
Try using recovery mode
Will this program allow me to recover?
I've tried installing (Win7/64) but it says "Would you like to install Heimdall...", I click Yes and nothing happens?
I did manage to install zadig drivers and that program did "see" my Samsung USB device.
Any advice is appreciated.
Use Linux and try this program. Dual boot.
http://xdaforums.com/showthread.php?t=1257434