Hi Anthony
Although your post is of some time ago ...
I am just working on my 2nd B&W A7 repair. This one seems to have the same issue as yours. I also noticed burn marks in the white thermal pad that touches to the bottom side of the Amplifier PCB. See picture:
[image|2774677]
However, when I look at the section of the Amplifier PCB that touches the thermal pad, I cannot see any burned/damaged component. See picture:
[image|2774678]
You have the damage between Mosfet's Q15 and Q20. My burn marks are between Mosfet Q25 and Q30.
Where are you now with the repair?[br]
Have you been able to solve it?
***My questions***
Does anyone:
# Know what component L38 is? (type/values)
# Have a list of all components of the A7?
# Have the electronics schematics?