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Ursprünglicher Beitrag von: Jurgen ,

Titel:

Noisy, but not fan related noise

Text:

This one has a constant hissy noise. At first I thought is was a bad fan, but after reving each of them up using Mac fan control, this background sound remains constant. Could it be the power supply? it comes on immediately with turning on the machine, and remains a constant ……

Gerät:

iMac Intel 21.5" EMC 2389

Status:

open