The screen flickers into hour-glass figure.

The screen doesn't flicker like it would when the refresh rate is low,it actually flickers very quickly in a split second motion that makesthe entire display that I'm looking at distort into an hour glassfigure. The browser that I was looking at right now as I typed waswarped into an hour glass figure and I could see the black empty spaceof the screen surrounding the "hour glass".
It's a CRT monitor, 17 in screen eView 17f3 model 786N and it'shonestly scaring the **** out of me every time it does it. Maybe I'mparanoid but I think it might explode.