thomasb skrev:Er det ikke bare å koble den fra strøm før man åpner den?
bert202 skrev:Thomas's problem probably is probably not normal. I work at a campus with around 800 iMacs and I have seen his problem before. I've been with macs that make a high piched sound and it's hard to even be in the same room because its so loud and for fear of the screen imploding and sending shrapnel at me.
Generally it is a bad component on the video board. Video boards are rotten to replace and that doesn't garentee that it is that. When you change the screen contrast and brightness you alter the amount of volts going through the components which inturn alters the pitch of the sound. Hope this helps.
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