RD-8 firmware update bricked my RD-8 help

So... I downloaded the latest synth tool for mac, and attempted to update from firmware 1.3.5 to the latest 2.0.2. Opened synth tool, it recognized my directly USB connected RD-8 on my mac pro 5,1 (OS 10.13.4)- firmware update page opened, instructions said to put RD-8 into DFU mode, so I power cycled the unit whilst pressing in the pin in the holde next to the USB port. the synth tool lost connection and the unit never displayed the wait text on it's screen. Now it only flashs the sugnal LED briefly when power ycled. The thing is bricked. Is there anything to do to recover this thing?