well i took it apart and the can/cover of a 470uf/25v cap fell out,strange as the can top wasnt buldged and the main body as in one piece,i replaced it,the old one measured 23nf,didnt bother checking esr,i have also removed the mains input connector and fitted an input filter with incorperated fuse from some old test gear,,the plastic case of the psu is covered in aluminium tape and electricaly bonded to the mains filter earth wire,will try it later,got to be better than s9+ of noise i hope? 73,