fyi,
this monitor uses a smps . if u hear a tic-tic-tic sound coming from the supply (w/pwr applied), there is likely a shorted h out xistor . (2sc3686 or 2sc3688, if i recall) if shorted , check caps around the flyback --BINGO! Either that, or I was attempting to say "before" but it was too many letters to type-- replacing hot.
don't forget to check the bypass cap on the h drive xformer ( likely 1uF @200v). this cap will cause premature failure of the hot when faulty. also check for poor solder joints on the drive xistor.
if smps not starting , the filter cap for pwm ic (47uf@63v) may be faulty.
yes, monitor is switchable 15/25khz. and generally not that difficult to repair ( imho)
qrz