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Monitor Screen darkens after spark sound is heard behind? Answered

Ive been happily using my computer for...3year or so. But Ive heard a high pitched(say near 5000hz) spark sounding noise(like when you rub your had in front of a tv as soon as you turn it on) from the back of the monitor and that same instance the screen slightly darkened. It a Sony CRT Monitor i don't know what is going on but its like the third time it happens Edit:Its happening more intense now whats going on?

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maybe the anode cap is a bit loose and is arcing a bit, producing the noise and impeding the current

it could be that the flyback transformer is going to die

that would not be good...but why would it die? i wonder if i could replace the flyback...nah well anyways all of the sudden it stopped and it hasn't happend since

c'mon almost a month and still only a few views and no answer to my problem?