FAN flow corrosion.
Int. print on power board between 51k and 51k SMD.
Changed many SMD resistors on the power board.
470k CPU side.
Used the new silicone paste for PFC and output voltage side PS
Wile test green and red LEDs flash shortly 10-20s
after this green stay on. Tested on real 230VAC after safe testing 
with isolated 230VAC input.