Yes , the previous owner did say some work was done under
warranty.
I have removed the daughter board. When I was testing for
continuity to make sure that the daughter board PCB inserts (8 pin connector) are
not conducting due excess to solder from de-soldering, and I realized the PCB insert 6
and 7 is conducting. Could this be due to faulty Q2 (IRF 740)? Also PCB insert
1 and 4 is conducting for some reason? Only way I can see this happen is due to
transformer tap 6 and 7 shorting.
Thanks for your help.