Apple MD094LL/A Manuale Utente

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 

 2010-09-09

Unlikely cause: speakers, microphone, rear housing

Burnt Smell/Odor
•  Burning smell
•  Unusual odor

1.  Verify that computer is the source of the odor.
2.  If system is new, see 

3.  Disconnect all third-party devices and check to 

see if any external device is the source of odor.

4.  Inspect air intake and air outlets for obstructions. 

To prevent overheating make sure there 

is sufficient clearance to allow air to flow 

unobstructed into and out of the system.

5.  Verify if system is functional.

1.  Verify if source of the odor 

can be identified by visually 

inspecting each module 

and its associated cables for 

signs of burned or damaged 

components, smoke residue, 

burned traces, or melted or 

damaged wiring,

Yes

Replace affected module(s). 

Go to step 2

No

Unable to locate source of 

odor. Go to step 3.

2.  Disconnect all third-party 

devices and cables. Power ON 

system and verify if smoke or 

strong odor returns.

Yes

Power down system 

immediately. Go to step 3.

No

System functions correctly. 

Verify system functionality 

with third-party devices and 

cables and return system 

to user if problem has been 

resolved. Consult third-party 

companies as needed for 

issues with those products.