Latest update turns kobo to brick

I bought a book last night and when I synced via wifi the latest software update was downloaded and asked me if I wanted to install. I did and watched as it began the update and then the screen went blank (black with only a ghost outline of the update text).

I have tried to reboot (blue light and then nothing), tried the pinhole, tried to do a factory reset (pinhole plus slider), tried plugging it into my computer (light turns green but I can't see the kobo as a drive), tried charging the kobo with a wall charger (light turns green and no difference no matter how long I leave it.)

Anyone have any suggestions?