Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au
Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au
Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au
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2010-08-05<br />
6. Substitute with a known-good<br />
display assembly and verify if<br />
LCD v<strong>id</strong>eo works.<br />
Backlight Issue / No Backlight<br />
Yes Replace user’s clamshell<br />
assembly.<br />
No No v<strong>id</strong>eo with known-good<br />
clamshell assembly. Replace<br />
logic board<br />
Unlikely c<strong>au</strong>se: Power adapter, battery, speaker, ODD/HDD, fan microphone, top case<br />
Quick Check<br />
Symptom Quick Check<br />
Backlight Issue / No Backlight<br />
• Display not illuminated<br />
• Flashing, unstable or non<br />
uniform background lighting<br />
• Poor backlight at some or all<br />
settings<br />
Deep Dive<br />
Check that brightness setting is above minimum.<br />
Check Result Action Code<br />
1. Connect external display, clear<br />
PRAM to set brightness to<br />
def<strong>au</strong>lt level and verify if Color<br />
LCD is listed in the System<br />
<strong>Pro</strong>filer’s Graphics/Displays<br />
device tree or using the<br />
Clamshell Service Diagnostic<br />
utility .<br />
2. Reseat the LVDS cable at the<br />
logic board. Verify again that<br />
LCD is listed in System <strong>Pro</strong>filer<br />
or Clamshell Service Diagnostic<br />
utility.<br />
3. Darken room and verify<br />
backlight by detecting if any<br />
glow is emitted from the<br />
display<br />
Yes Internal LCD panel detected<br />
by system. Go to step 3.<br />
No Go to step 2.<br />
Yes Display panel detected by<br />
system. Go to step 3.<br />
No Go to step 4.<br />
Yes Backlight operating. Go to<br />
step 5.<br />
No Go to step 4.<br />
L03<br />
M03<br />
<strong>MacBook</strong> <strong>Pro</strong> (<strong>15</strong>-<strong>inch</strong>, <strong>M<strong>id</strong></strong> 2010) Symptom Charts — Display 71
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