@mekon Is your power brick showing a green or red light? If you're getting a green light, try this:
Plug in the board, then press and hold the power button on the board until the indicator light on the power brick turns from green to red. See if that kick starts the charge on your board.
I had this problem and this fixed it after a 48 hour charge attempt that did nothing. After searching through the FM troubleshooting materials, this is what I came up with... Let me know if it works!