The L13 LED on Arduino Yun is always ON

Hi guys,

For some reason the L13 LED on my Arduino Yun is always ON right now, I have tried the Blink example or set pin 13 to LOW manually but got no luck, the LED will always stay ON . I also tried reconnecting to the board or use all 3 reset buttons however no matter what I did, L13 always stay solid.

Does anyone know what's the problem here? Thanks in advance!

Does the upload process finish with success or you get some errors after you upload it?