Bricked black Jaguar after bad firmware update

[FRC4ME]

Okay, so today we were really excited to finally get the CAN working and began the process of flashing all of our Jaguars. We're using a black Jaguar as a bridge between a PC serial port and the CAN interface.

Everything was going well, until I accidentally flashed the grey firmware onto the black Jaguar (I was assigning a new ID to a grey one further down the line, then ran the firmware update without realizing the active board resets to the lowest ID (the black Jag in our case) after an assignment). After this, the LED doesn't light up and the black Jag won't respond to any commands.

The real problem is, we have tried all of the common solutions to this problem. We tried downloading the correct firmware from the bdc-comm command line utility. We tried downloading to ID 2 (what we had last set it to) and ID 1 (the default); neither work. The download appears to progress but takes forever (about an hour), and after it reaches 100%, the Jaguar still has no light and does nothing.

We also tried using the bdc-comm boot command, which is supposed to send firmware to a Jaguar if you boot it while holding down "the button" (I assume this means the user button). When we do this, bdc-comm seems to respond; a huge amount of "." characters suddenly fill the command line window. But no download starts and nothing happens to the Jaguar.

Is there anything else we can try? I don't understand why the normal solutions to this problem aren't working for us. Is there a way to broadcast firmware (send to ID 0)? Any way to reset the Jaguar to factory defaults?

Thanks for any assistance