Screaming Picture Tube???

[kx250rider]

With good hope, I bet all that's wrong is that the anode lead is loose, and is stuck on by the suction cup only! Has happened to me many many times. (if not familiar), beware that when you go to check it, you can get a 13,000 volt shock if you don't ground it out first even if the TV has been unplugged... Take a thin long screwdriver, attach a wire from the screwdriver to the metal TV chassis, then stick the screwdriver under the suction cup to ground it out. Obviously use a plastic-handle screwdriver.

No promises, but hopefully that's it! If not, then Bryan also has an excellent guess with the horizontal freq being way off. That can come into the sound if it's that far off, and it will make a high pitch noise from the yoke.

THIRD possibility is a broken or cracked picture tube. If you see purple flashing in the neck of the tube, then you have a broken picture tube, hopefully not though!

Charles