Avatar of Dennis Pillow
Dennis Pillow
Flag for United States of America asked on

iMac mid 2010 27" is screaming at me

I have an iMac 27" mid 2010. When it is being used to watch You Tube videos it will make a supersonic screaming sound and must be physically turned off with the power button. The computer just stops working. Could I be looking at a failing hard drive or fan? Any ideas will be appreciated.
Mac OS XApple Hardware

Avatar of undefined
Last Comment
David Anders

8/22/2022 - Mon
Paul Sauvé

does this occur event with the speakers off?

if the sound is coming through the speakers, then it is possible a problem the sound card

supersonic - when an object goes faster that the speed of sound...    ;-)
Dennis Pillow

ASKER
I have seen it do this with just normal use, not using the sound. The sound does not seem to come from the speakers and when this happens there is no control for anything.

Note: Maybe I should have used the analogy of a sound like a 600 cycle generator on the flight line in the winter in Alaska....That is loud :-)
ASKER CERTIFIED SOLUTION
Aaron Tomosky

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.
View this solution by signing up for a free trial.
Members can start a 7-Day free trial and enjoy unlimited access to the platform.
See Pricing Options
Start Free Trial
GET A PERSONALIZED SOLUTION
Ask your own question & get feedback from real experts
Find out why thousands trust the EE community with their toughest problems.
Dennis Pillow

ASKER
Thank you for the heads up. I will try the solution.
Your help has saved me hundreds of hours of internet surfing.
fblack61
Aaron Tomosky

Easy test:
Get a can of compressed air, remove the memory cover  (the vent at the bottom center) then when it makes the noise blow some bursts of air at the noise, probably straight up. If the noise changes with the air, it's absolutely the fan.
Dennis Pillow

ASKER
Will Do!
David Anders

Resetting the SMC is often suggested as a first step.
https://support.apple.com/en-us/HT201295

Google "imac fans loud"
⚡ FREE TRIAL OFFER
Try out a week of full access for free.
Find out why thousands trust the EE community with their toughest problems.