3.

Use known-good SDRAM in the

Yes

Install user’s SDRAM one by

X01

 

system. Verify if system start

 

one and retest. If kernel panic

 

 

without kernel panic now.

 

repeats, replace affected

 

 

 

 

SDRAM. Verify if correct

 

 

 

 

SDRAM specification is being

 

 

 

 

used.

 

 

 

 

 

 

 

 

No

Go to step 4.

 

 

 

 

 

 

4.

Wait for 20 seconds after

Yes

Go to AirPort Card Kernel

 

 

shutdown and disconnect

 

Panic symptom flow.

 

 

AirPort cable on logic board.

 

 

 

 

Verify if system starts without

No

Go to step 5.

 

 

kernel panic now.

 

 

 

 

 

 

 

 

 

 

5.

Disconnect SATA cable from

Yes

Go to Hard Drive Not

 

 

hard drive and startup to the

 

Recognized symptom flow.

 

 

Install DVD in the optical drive

 

 

 

 

or from an external volume.

 

 

 

 

No

Go to step 6.

 

 

Verify if system starts without

 

 

 

 

 

 

kernel panic now.

 

 

 

 

 

 

 

 

6.

Disconnect camera and

Yes

Go to Camera Issues or

 

 

microphone cables from logic

 

Audio: Microphone symptom

 

 

board. Verify if system starts

 

flow as appropriate.

 

 

without kernel panic now.

 

 

 

 

No

Go to step 7.

 

 

 

 

 

 

 

 

 

7.

Disconnect Bluetooth cable

Yes

Go to AirPort/Bluetooth

 

 

on logic board. Verify if system

 

Issues symptom flow.

 

 

starts without kernel panic

 

 

 

 

No

Go to step 8.

 

 

now.

 

 

 

 

 

 

 

 

 

 

8.

Disconnect SD board on logic

Yes

Go to SD Card Not

 

 

board. Verify if system starts

 

Recognized symptom flow.

 

 

without kernel panic now.

 

 

 

 

No

Go to step 9.

 

 

 

 

 

 

 

 

 

9.

Disconnect optical drive and

Yes

Go to Optical Drive Not

 

 

test. Verify if system starts

 

Recognized symptom flow.

 

 

without kernel panic now.

 

 

 

 

No

Replace logic board.

M06

 

 

 

 

 

 

 

2010-09-09

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power  45

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Image 45
Apple MD094LL/A manual X01, Go to Camera Issues or, Go to AirPort/Bluetooth, Go to SD Card Not, M06