Reply to thread

Message

[QUOTE="chscag, post: 1019116, member: 46727"] You're probably hearing fan noise - most likely vibration from the fan or housing around it. Buzzing can sometimes be caused by the LCD backlight, however, since your 27" model uses an LED backlighted screen, that is unlikely. Power supplies can sometime make a buzzing or humming sound, but that is usually associated with switching type supplies which your iMac doesn't use. Regards. [/QUOTE]

Verification

How many occurrences of a n-u-m-b-e-r between "d" and "f" in this example...(sdgs6ngklu3gd#f9%)?