820-4924 no ppbus

[2informaticos]

L7130 is part of buck controller.
You cannot get PPBUS_G3H if L7130 is lifted...
Pull out F7140 and check which side the short remains.
BTW, which is the exact value of that "short"?
Check if any big coil (secondary supply) has the same value, in respect with ground.

Be sure C7125 is in place, or you can risk to fry Q7130 again...

 

[JohnB8812]

If you have 15 volts, I don't think you can possibly have a short...if you're worried on that removed F7140 and see if there is a low resistance reading on either side of the fuse. 16 volts means, Q7130 is shorted and always open. If this is the problem, replace Q7130, the ISL6259, and Q7155 all at the same time.