i changed pwm chip, mosfet and lots of small resistors aroun the mosfet i used all parts like in schematic i only used different mosfet which is basicly the one that works with 800v instead of 700v ill need to check what model is it, schematic is in the attachment, i measured the output voltage 5vsb jumps between 3-7v and 24v jumps from 13-26v and on the scope its just a mess some weird looking sine wave on top of changing dc voltage