Apple MacBook Pro 13 inch - Page 65

MacBook Pro (13-inch) Symptom Charts — Display 65
2010-09-14
Deep Dive
Check Result Action Code
1. Connect external display, clear
PRAM to set brightness to
default level and verify if Color
LCD is listed in the System
Proler’s Graphics/Displays
device tree.
Yes Display panel detected by
system. Go to step 3.
No Go to step 2.
2. Run Clamshell Service
Diagnostic utility and check
for LCD panel presence. If not
found, reseat the LVDS cable
at the logic board. Repeat
verication in System Proler.
Yes Display panel detected by
system. Go to step 3.
No Go to step 4.
3. Darken room and verify
backlight by detecting if any
glow is emitted from the
display
Yes Backlight operating.
Go to step 5.
No Go to step 4.
4. Swap memory with known-
good memory to determine if
video issue is RAM related.
Yes Reseat or replace defective
memory
X01
No Go to step 5.
5. Inspect LVDS connectors and
cable under magnication for
pinched cables and damaged
or bent pins. Do any of the
connections appear to be
defective?
Yes Defective LVDS cable. Replace
display assembly.
Defective LVDS connector
on logic board. Replace logic
board.
M25
No If connections are OK and
secure and the display is still
blank, go to step 6.
6. Substitute a known-good
display clamshell to test
logic board video output. Is
backlight and display text back
to normal?
Yes Replace display assembly. L09
No Poor or no backlight LED
Driver power at logic board.
Replace logic board.
M25