I am not even an expert, but I will try to remember to highlight really crucial things like this. Obviously, I am not responsible for your safety.
Lezgo! But First: You will be dealing with mains voltage and large capacitors, both of which can injure or kill, the latter even after the power has been disconnected. Drop me a line if it was helpful or you have any questions, comments, corrections, additions, rude gestures, barnyard animal noises, etc. Sadder yet wiser from the experience, I wanted to write up a really thorough walkthrough of how to fix it if you’re having the same problem, because it might be helpful to someone and overall it was actually kind of an amazing experience for me. In the process of fixing the problem, I learned more than I ever wanted to know about capacitors, vintage electronics repair, and why drinking and soldering don’t mix. A few years ago, it started making a horrible buzzing noise, which from research on the internets I identified as ripple voltage from failed power capacitors. It’s an amazing piece of equipment, assembled by hand and weighing in at around 40 pounds. Prologue: I inherited a McIntosh 1700 amplifier from the 70’s from my grandfather.
