I got a virtually immediate reply ~ I did ask the contact@ address to check whether support@ team had received my email as well though.
Sadly any faint hope that the problem was anything other than hardware failure were dashed ... CyBook is on it's way back to Paris to be given the re-soldering of life
Which means, with my iLiad stuck in the Netherlands awaiting a battery transplant and my CyBook out of action, I'm out of eBook devices
For information, even for warranty repairs customer is responsible for shipping costs back to Paris. Thankfully as it weighs virtually nothing this isn't expensive. Bookeen will pay for shipping back to Customer. All customs / duties payable, for those of you outside the EU, are customers responsibility.