Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 72

Deep Dive: Non-uniform Brightness, Reseat LVDS cable

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7. Substitute a known-good Yes Replace display assembly L05 display assembly module to module. test logic board LVDS video output. Is normal video restored? No Replace logic board. M04 Deep Dive: Non-uniform Brightness Check Result 1. Determine if brightness Yes uniformity issue is visible after display has warmed up for 15 No minutes. 2. Check LVDS cable connection Yes to logic board. No 3. Determine if variation in Yes uniformity appears excessive when compared to another No similar unit. Action Go to step 2. Display backlight can take several minutes to stabilize. Reseat LVDS cable Got to step 3 Replace display assembly. Explain to user that LCD appears to meet specifications. Code L07 2010-06-15 MacBook (13-inch, Aluminum, Late 2008) Symptom Charts - Display 72

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MacBook (13-inch, Aluminum, Late 2008) Symptom Charts — Display
72
2010-06-15
7.
Substitute a known-good
display assembly module to
test logic board LVDS video
output. Is normal video
restored?
Yes
Replace display assembly
module.
L05
No
Replace logic board.
M04
Deep Dive: Non-uniform Brightness
Check
Result
Action
Code
1.
Determine if brightness
uniformity issue is visible after
display has warmed up for 15
minutes.
Yes
Go to step 2.
No
Display backlight can take
several minutes to stabilize.
2.
Check LVDS cable connection
to logic board.
Yes
Reseat LVDS cable
No
Got to step 3
3.
Determine if variation in
uniformity appears excessive
when compared to another
similar unit.
Yes
Replace display assembly.
L07
No
Explain to user that
LCD appears to meet
specifications.