I have acquired a SpectronIQ PLTV-4250... same as Protron PLTV-4250... been looking for a Service Manual or Schematic... no luck.. apparently this set is a real turd.. (guess they all are when they are broke huh?) The set powers on, but it makes a screeching noise from the speakers and has some screen distortion now.. found a couple bulging caps on the power supply board... I plan to replace all the caps`anyway... but i suspect the screeching is coming from the mainboard... anyway, if anyone knows where i can get a service manual/schematic or has any experience with this unit.. I'd appreciate...