iMac (27-inch, Mid 2010) Symptom Charts — Display 63
2010-09-09
3. Verify if issue is visible on an
external display attached to
mini DisplayPort.
Yes Issue NOT caused by internal
LCD panel. Go to step 7.
No Go to step 4.
4. Inspect glass panel. Verify if
issue is caused by condensation
or contaminants on inside
surface of glass 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 5.
5. Remove glass and LCD panel.
Disconnect DisplayPort cable
between LCD display and logic
board, and verify if there is
damage to cable or connectors.
Repeat with vertical sync cable
connected between LCD panel
and LED backlight board.
Yes Replace DisplayPort cable,
vertical sync cable or any
other damaged part/module.
X03
No Reinstall DisplayPort cable
and vertical sync cable.
Go to step 6.
6. Verify if issue is still visible after
reinstalling internal DisplayPort
cable and vertical sync cable.
Yes Replace LCD panel.
Run Apple Service Display
Utility to verify the resolution
of issue.
Enter the resulting verication
code into the “Notes” eld
of GSX and return system to
customer if repair is complete
L04
No Issue resolved.
7. Remove video card, inspect
connector for damage or
corrosion then reinstall. Verify if
issue still occurs.
Yes Replace video card. Go to
step 8.
No Issue likely caused by poor
video card connection.
8. Verify if distorted/blurred
image issue is still present.
Yes Replace logic board. Go to
step 9
M04
No Issue resolved.
9. Verify if issue is still present
with replacement logic board
installed.
Yes Return to step 1 and retest.
No Issue resolved.