I recently ran into the same issue, I was trying to update the firmware and the upgrade failed, effectively bricking my PCIII. Spent about 2 hours on the phone with tech support (really good guys) and we tried all the tricks he had in the book. New 9v battery's, the programmer module that comes with the ignition modules, I even made a little device to provide a constant 9v using an old power adapter I had. Couldn't get it working at all. I've only had it for about 9 months so it was under warranty still. Ended up getting an RMA number and shipping it off to DynoJet for repairs. I'm hoping to get it back either today or tomorrow.
Your best bet is to call tech support and work with them to see if you can unbrick it. If not, you will end up having to ship it back to them, no choice really. Tech support is free and they are really great guys, at least from my experience.