Someone can repair a 1084s monitor?

[Pat the Cat]

Dangerous to try repair yourself though. Cribbed this from justanswers.com

Still, the described symptom would almost always point to a high voltage arc. The snapping sound is produced by the high voltage sparking over an air gap.

...
Possible suspects are:

    • failing CRT / high voltage is jumping at the neck and/or at the rear PCB (least likely);
    • dampness / dust at the anode cap providing a spark patch for the high voltage to jump over (likely);
    • a crack in the FBT (flyback transformer) hence the high voltage is leaking out (most likely).

There are other places where high voltage can leak to earth and produce the sound.

What you really need is a technician who is competent with high voltage analog electrical repair. Keep asking, if they are happy with terms like "Line Output Transformer" and working close to thousands of volts, they can probably find exactly where the leak is.