transformer buzzing

If anyone has any ideas, or has dealt with a similar issue on a G-9000/G-901, I would really appreciate any additional troubleshooting suggestions that might help me narrow down the cause of this transformer buzzing. Issue: The unit powers up normally, comes out of protection, and plays music...

Hello fellow AK'ers Was hoping if I could get some help on this . I did read many forums here on the subject noisy transformer as well as other forums . Read about vanishing resin potting etc all the differences. The transformer in my pioneer a-7 makes loud buzz after 30mins to 40 mins with...