Gigabyte GA-H81TN no 19v short

[Mabot17]

Hello,i have this motherboard for repair and sadly it has no 19v at the
Second mosfet output.I don't have schematics so from now on i have to go with my legs.
I removed the mosfet to test it and it's good, I think the 19v line is shorted to ground. I also found something strange, a coil completely shorted at its ends, marked magic 3R3, I'll post some photos to help you understand better and if I can make a more accurate diagnosis, could it also be the SIO chip short?
Cheers
Mauro

[Mabot17]

Re: Gigabyte GA-H81TN no 19v short

Images post

[The1]

Re: Gigabyte GA-H81TN no 19v short

By shorted how many ohms?

Could try putting 0.9v and a few amps into the coil and see what gets hot.

[Mabot17]

Re: Gigabyte GA-H81TN no 19v short

Hi, thanks for answering me, the coil is clearly shorted, and I really mean 0 ohms on both sides. I removed the coil and it is actually shorted, then I injected voltage 0.7v 2A, the SIO chip lit up , while on the other side it doesn't heat anything. At this point I think the games are over,
Thanks,
Mauro