Hello I have a mid-2010 MBP which I got in January. Since then, the charger will just all of a sudden stop charging - the LED on the charger goes out completely. Disconnecting and reconnecting the MagSafe will work. Nothing changes to stop the charging - there's no force on the lead etc. I've had 3 new chargers - all components including the lead and the problem still hasn't gone away. Any ideas? Thanks Tom.