So after 5 hours of trying to figure this one out via youtube, google, microsoft support and getting nowhere I thought I would offer this up for guidance. This morning I switched on my surface book, plugged in the charger and away I went. After 20mins I noticed that there was no charging icon on the screen, and I checked the light on the connector - no light. But then I checked the usb on the adaptor and it was powering as normal. Then I disconnected the screen from the base... and connected the adaptor to the screen - still no light but the battery icon showed it was charging and indeed it did. I reconnected the screen and tried again with the base and no light, no charge. Any ideas as to what is going on?