 Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au

2010-08-05
Deep Dive: Incorrect/Missing Colors
Check Result Action Code
1. Verify display is listed in the
System Profiler’s Graphics/
Displays device tree.
2. Verify System Preferences
Display Profile is valid for
display being tested. Color
profile should be set to Color
LCD, user may have created an
off-color calibration setting.
3. Verify if the glass panel is free
of contaminants.
4. Run Clamshell Service
Diagnostic utility and check
for LCD panel presence. If not
found, reseat and check that
LVDS cable is secure to the
logic board. Verify if colors are
restored.
5. Set desktop pattern in System
Preferences to ‘Solid Gray Light’.
Verify if incorrect/missing color
issue affects entire display.
6. Set up display under test side
by side with another known
good display showing the
same image. Verify if issue is
noticeably worse on the user’s
display being tested.
7. Substitute a known-good
display assembly to test logic
board internal video output.
Verify if normal video is
restored.
Yes This ensures color profile can
be matched with LCD. Go to
step 2.
No Check for correct LCD
identification. Go to step 4
Yes If display profile is valid and
the colors are still incorrect or
missing go to step 3.
No Set System Preferences:
Displays: Color to Color LCD
and retest.
Yes Go to step 4.
No Clean glass panel using
approved method. Retest.
Yes Loose LVDS cable connection.
Issue resolved.
No Go to step 5.
Yes Test needed with a knowngood
display. Go to step 7.
No Go to step 6.
Yes Test needed with a knowngood
display, Go to step 7
No Small variations in color
uniformity are normal and do
not warrant replacement or
repair of the display.
Yes Replace user’s display
assembly.
L02
L02
No Replace logic board. M04
MacBook Pro (15-inch, Mid 2010) Symptom Charts — Display 65