Cheers for the suggestion String - popped out and disconnected the battery and tried to fire up my wayward Vox again but no joy. Still got the flashing green light and an utterly blank screen. I've contacted Kobo via email and have received an incident number and the promise that they'll get back to me - but there's higher than usual demand right now (no shocks there!) . Here's hoping they get back to me soon. Oh, and wouldn't you just know it - my Vox is out of it's 12 month warranty by a few days. It might be time to dig deep and spend some ££ on a new toy!