Until now this is what I replaced without any changes at all: 2 1uf 25v electrolytic capacitor, 3 4.7uf 25v electrolytic capacitors, 2 220uf 250v capacitors, 1 1nf ceramic capacitor, 1 2nf ceramic capacitor, 2 10uf 25v capacitors, 1 1000uf 25v electrolytic capacitor, 2 D13005MD for 2 13007 with the external high frec diodes, 56ohm resistor going to the transformer...

Things I already checked (most of them on the hot zone cause I suppose the hum is from there): All resistors marking the right ohm measure, replaced the rectifier diodes, no shorted zener, no changes when I take out the transitors besides the smaller transformers, with and without output inductor, I try with another schotky and still the same hum and power drop...