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 />
Blank / No V<strong>id</strong>eo<br />
Unlikely c<strong>au</strong>se: Power adapter, speakers, ODD/HDD, fan, microphone, top case<br />
Quick Check<br />
Symptom Quick Check<br />
Blank / No V<strong>id</strong>eo<br />
• No v<strong>id</strong>eo<br />
• No backlight<br />
Deep Dive<br />
1. Check brightness setting<br />
2. Attach known-good supported external display.<br />
3. Boot from Mac OS X install DVD that came with<br />
computer.<br />
Check Result Action Code<br />
1. Verify boot chime present<br />
when system restarted.<br />
Reset SMC and clear PRAM if<br />
necessary for proper start up.<br />
Verify if LCD v<strong>id</strong>eo is present.<br />
2. Connect known-good<br />
supported external display.<br />
Verify if image appears on<br />
external display when system<br />
is booted.<br />
3. Verify if LCD backlight is on<br />
by looking for faint glow<br />
from display when viewed<br />
in darkened room with<br />
brightness adjusted to full.<br />
4. Shine bright (low heat)<br />
flashlight into the front of LCD.<br />
Verify if an image is being<br />
displayed.<br />
5. Run Clamshell Service<br />
Diagnostic utility and check<br />
for LCD panel presence. If<br />
not found, reseat LVDS cable<br />
connection to logic board<br />
and check that connection<br />
is secure. Verify if image is<br />
restored by reseating LVDS<br />
connection<br />
Yes Go to step 3.<br />
No Go to step 2.<br />
Yes External display detected by<br />
system. Go to step 3.<br />
No Go to No V<strong>id</strong>eo symptom<br />
code flow.<br />
Yes V<strong>id</strong>eo signal from system<br />
to external v<strong>id</strong>eo is OK, LCD<br />
backlight is on. Go to step 5.<br />
No Go to step 4.<br />
Yes Image present but backlight<br />
is not on. Check logic board<br />
connections. Go to step 5.<br />
No Go to No V<strong>id</strong>eo symptom<br />
code flow.<br />
Yes Loose LVDS connection. Issue<br />
resolved.<br />
No Continue to test with knowngood<br />
display assembly. Go to<br />
step 6.<br />
<strong>MacBook</strong> <strong>Pro</strong> (<strong>15</strong>-<strong>inch</strong>, <strong>M<strong>id</strong></strong> 2010) Symptom Charts — Display 70
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