Sure, look where the white plastic edge (Where the orange and white and blue and yellow wires are going to) of the transformer is peeking out at the bottom of the PC board. This is just asking for problems. Whatever that postage stamp sized IC, and the two little ones are for, I would bet they are important. And there's probably another one or two on the other side. I guess you can put a fan on it to keep it from cooking, but it's just a no-brainer:
Compared to a Yamaha RX-A860: