A noticeable whistle / squeak is heard when the screen is turned on. It disappears completely at minimum brightness. It is enough to increase the brightness by one step and the whistle appears again. This is probably the sound from the converter that powers the backlight of the screen. How can this problem be solved?
I have the same problem, I noticed that hissing noise since I bought the computer but I have no clue how to solve it. It´s quite annoying when I am in quiet places. Thanks anyway because now I know that the noise comes in when the screen is not on the minimum brightness.