Hey Andres,

puede ser que tengas el rail de voltaje bajo cortocircuitado a tierra.

hay un diodo cerca del pin numero 4 que has marcado en la primera imagen, you comprobaria que ese diodo estubiera bien con un multimetro

si cambiaste pi3usb tambien chequearia que no hay ninguno de los railes que llevan 1.8v y 3v a tierra.

nos podrias decir los voltajes que mides en los pines del conector del ventilador?

te dejo adjunto una guia que he creado despues de juntar montones de cosas de los foros, igual encuentras algo que te ayude alli

buena suerte !!!! y saludos para Chile!

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perdona! el documento anterior tenia todas las fuentes en blanco LOOL aqui corregido

 

tengo 0.8 volts en pin 1 y 4

 

pin 2 and 4 are in short, image 1 reference
i replace integrate 2 in the second image but still in short pin 2 and 4
with or without integrated short still

bettwe pin 1 and 4 are 0.8 volts, they have 3.8 in normal work

 

what diode my friend
is nearly conector of the fan?

 

ok, i have the same model, can remember this piece in my board have two extreme to the ground. i try tomorrow, i dont have replace for this piece , i have 2 more board but they no have this piece.
i can understand very fine but u have the same problem and could you achieve fan work?

 

confirmed removed shorted diode and the short on the pin went away fan started working as it should now ! yay =)