Batboard

Using CPS 11.5 build 621 I decided to upgrade the firmware on my VHF 6550. Everything appeared to be working when I got an error message and the radio was sitting with a blank green screen. I was unable to do anything at that point and now the radio won't even turn on. I tried the Manual way to put it in Flashzap and nothing. So is this thing a brick and will need to go back to Motorola or does someone have a trick up their sleeve ??

Thanks

Craig