Deep Dive

Check

Result

Action

Code

 

 

 

 

 

1.

Boot from Install DVD and

Yes

Go to step 2.

 

 

Verify if issue is still visible.

 

 

 

 

No

Issue likely caused by

 

 

 

 

 

 

 

software or driver issue.

 

 

 

 

Troubleshoot for software

 

 

 

 

issues. Make sure all software

 

 

 

 

and firmware updates have

 

 

 

 

been installed.

 

 

 

 

 

 

2.

Verify if issue is visible on an

Yes

Issue is NOT caused by

 

 

external display.

 

internal LCD display.

 

 

 

 

Go to step 3.

 

 

 

 

 

 

 

 

No

Go to step 6.

 

 

 

 

 

 

3.

Remove video card, inspect

Yes

Replace video card.

M04

 

connector for damage or

 

Go to step 4.

 

 

corrosion. Reinstall video card

 

 

 

 

No

Issue resolved by reseating

 

 

and retest. Verify if issue still

 

 

occurs.

 

video card.

 

 

 

 

 

 

4.

Verify if video corruption issue

Yes

Replace logic board. If a video

M04

 

is still present.

 

card was replaced, reinstall

 

 

 

 

the user’s original video card.

 

 

 

 

Go to step 5.

 

 

 

 

 

 

 

 

No

Issue resolved with

 

 

 

 

replacement video card.

 

 

 

 

 

 

5.

Verify if video corruption issue

Yes

Return to step 1 and retest.

 

 

is still present with replacement

 

 

 

 

No

Issue resolved with

 

 

logic board installed.

 

 

 

 

replacement logic board.

 

 

 

 

 

 

6.

Inspect glass panel. Verify if

Yes

Clean glass and/or LCD using

 

 

issue is caused by condensation

 

procedures in Glass Panel

 

 

or contaminants on inside/

 

take-apart chapter.

 

 

outside surface of glass panel,

 

Identify possible sources

 

 

or on surface of LCD panel.

 

 

 

 

of contamination (nearby

 

 

 

 

 

 

 

 

cigarette/cooking smoke,

 

 

 

 

heavy airborne dust, etc.)

 

 

 

 

to prevent recurrence.

 

 

 

 

Condensation should

 

 

 

 

dissipate after computer has

 

 

 

 

been running a few hours.

 

 

 

 

 

 

 

 

No

Go to step 7.

 

 

 

 

 

 

2010-09-09

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power  49

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Apple MD094LL/A manual M04