820-2879 board not booting ! white led keeps on

[turbo]

820-2979 board, fan spin regular speed, there is cpu-vcore.... do not not boot.. thats led white light (right by the hd) keeps on when press power button ...noting on scree. with external screen noting on the screen too... any help

 

[dukefawks]

Resistance to GND on 3V42 bus? History of board? Water?