Arduino Yun; pin 13 led not working ?

I just got a new Yun and it appears that the built-in led on pin 13 does not work.
An external led on pin 13 works fine. Anything I can do ? Thanks!

When I first ran the blink sketch I thought there wasn't a led, it is over by the Yun reset button.

I know where the led is... but it doesn't light up !!!