X1 Yoga wont sleep when lid closed.

[danobolto]

Hi!
I have a bizzare issue with my Gen 1 X1 Yoga. The machine will not sleep when the lid is closed. I know this is not a software issue as holding a magnet above the sensor (in between the caps lock and shift key on the left keyboard bezel) sleeps the machine.

Does anyone know where / what the magnet is thats meant to interact with this sensor? I assume it is meant to be positioned somewhere in the Screen bezel? if so does anyone know if this is something that could potentially be checked / serviced by a user or will i be bringing my machine to a repair centre.

Cheers