Apple Technician Guide MacBook Pro (17-inch, Early 2009) - tim.id.au

2010-06-11
Blank / No Video
Unlikely cause: Power adapter, speakers, ODD/HDD, fan, microphone, top case
Quick Check
Symptom Quick Check
Blank / No Video
• No video
• No backlight
Deep Dive
1. Check brightness setting
2. Attach known-good supported external display.
3. Boot from Mac OS X install DVD that came with
computer.
Check Result Action Code
1. Verify boot chime present
when system restarted.
Reset SMC and clear PRAM if
necessary for proper start up.
Is LCD video present?
2. Connect known-good
supported external display.
Verify whether image appears
on external display when
system is booted.
3. Verify if LCD backlight is on
by looking for faint glow
from display when viewed
in darkened room with
brightness adjusted to full.
4. Shine bright (low heat)
flashlight into the front of LCD.
Verify if an image is being
displayed.
5. Run Clamshell Service
Diagnostic utility and check
for LCD panel presence. If
not found, reseat and verify
that the display connections
to the logic board are secure.
Verify if image is restored after
reseating loose connections
Yes Go to step 3.
No Go to step 2.
Yes External display detected by
system. Go to step 3.
No Go to No Video symptom
code flow.
Yes Video signal from system
to external video is OK, LCD
backlight is on. Go to step 5.
No Go to step 4.
Yes Image present but backlight
is not on. Check logic board
connections. Go to step 5.
No Go to No Video symptom.
Yes Issue resolved.
No Continue to test with knowngood
display assembly. Go to
step 6.
MacBook Pro (17-inch, Early 2009) Symptom Charts — Display 75