I'm using an early 2009 imac(20") with a buzzing sound on startup. After 15 seconds or so it starts pretty suddenly, then stays on for 5 minutes or so. It gradually gets quieter. It doesn't come back when the machine is on, and subsequent restarts don't get the sound to come back. If the machine is turned off for a while the sound will come back when rebooted.
I'm thinking power supply. Does anyone have any opinions on this? And how much would it cost to fix? I'd rather not take the computer apart myself since it's not mine, but would be willing to if it's going to be multihundreds of dollars to get it fixed.
I'm thinking power supply. Does anyone have any opinions on this? And how much would it cost to fix? I'd rather not take the computer apart myself since it's not mine, but would be willing to if it's going to be multihundreds of dollars to get it fixed.