Apple MD094LL/A 사용자 설명서

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

 2010-09-09

1.  Boot from Install DVD and 

Verify if issue is still visible.

Yes

Go to step 2.

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 

external display.

Yes

Issue is NOT caused by 

internal LCD display. 

Go to step 3.

No

Go to step 6.

3.  Remove video card, inspect 

connector for damage or 

corrosion. Reinstall video card 

and retest. Verify if issue still 

occurs.

Yes

Replace video card. 

Go to step 4.

No

Issue resolved by reseating 

video card.

4.  Verify if video corruption issue 

is still present.

Yes

Replace logic board. If a video 

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 

is still present with replacement 

logic board installed.

Yes

Return to step 1 and retest.

No

Issue resolved with 

replacement logic board.

6.  Inspect glass panel. Verify if 

issue is caused by condensation 

or contaminants on inside/

outside surface of glass panel, 

or on surface of LCD panel.

Yes

Clean glass and/or LCD using 

procedures in Glass Panel 

take-apart chapter.

Identify possible sources 

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.