electrical sound

Hello, I have read several messages about this, but I found no clear answer. My iMac 2017 5K high end configuration with pure ssd, since day 1 has an electric noise every time something is moving on the screen. This is only audible when my room is silent and i place my ear near the iMac. It...

I have a 2017 mac book pro and I am using the power supply that it came with. Tonight I noticed instead of a beep when I plugged the power supply in I got a loud, screeching sound that sounds electrical or static like. The computer is still charging but am wondering if this is an issue anyone...