2. Verify if noise sounds like one

Yes

Fans running fast. Reset SMC

 

or more fans running faster

 

by disconnecting power cord

 

than expected.

 

for ~15 seconds then retest. If

 

 

 

issue continues go to step 3.

 

 

 

 

 

 

No

Go to step 3.

 

 

 

 

 

3. Verify if any tape, gasket, cable

Yes

Secure the material so it

 

label, or cable is touching

 

doesn’t touch fan blades. If

 

the fan blades and causing a

 

tape adhesive has lost its

 

ticking noise

 

stickiness, replace that section

 

 

 

of tape

 

 

 

 

 

 

No

Go to step 4.

 

 

 

 

 

4. Remove fans and rotate blades.

Yes

Go to step 5.

 

Check for any dust that could

 

 

 

be clogging the fans. Verify

 

 

 

if fan blades spin smoothly

 

 

 

No

Replace affected fan(s).

X23

without interference from fan

 

 

 

housing and fan blades are all

 

 

 

intact.

 

 

 

 

 

 

 

5. Run latest available Apple

Yes

Noise issue resolved.

 

service utilities then ASD

 

 

 

No

Check for correct sensors/fans

 

in stand-alone tests looping

 

 

connections on logic board.

 

mode, to verify if all sensor or

 

 

 

Check for pinched cables.

 

fans related tests pass.

 

 

 

Compare with known-good

 

 

 

 

 

 

similar system, and check

 

 

 

for unlisted sensors. Replace

X22

 

 

affected sensor/fan.

 

 

 

 

 

 

 

Stand/Hinge Issues

Symptoms

Quick Check

 

 

 

Stand/Hinge Issues

1.

Determine whether damage caused by user /

Bent stand

 

technician environment, accidental damage, or

Broken hinge

 

abuse. If so, inform user/technician the failures

 

are not covered by Apple warranties. Refer to

Stripped screw/head

 

 

http://www.apple.com/legal/warranty

Stripped screw boss

 

2.

For hinge noise issues replace hinge mechanism.

• Unable to install VESA mount (if

 

 

 

supported on this model)

3.

For information on selecting the adequate iMac

 

 

 

VESA Mount Adapter and which computer

 

 

 

models are supported, refer to installation

 

 

 

manuals available at http://support.apple.com/

 

 

 

manuals/#desktopcomputers

 

 

 

 

2010-09-09

iMac (27-inch, Mid 2010) Symptom Charts — Mechanical  122

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Image 122
Apple MD094LL/A manual X23, Symptoms Quick Check Stand/Hinge Issues, Manuals available at http//support.apple.com