 Apple Technician Guide MacBook Pro (15-inch, Mid ... - tim.id.au

2010-08-05
Won’t Start Up
Unlikely cause: display assembly, speakers, fan, camera, microphone
Quick Check
Symptom Quick Check
Power but No start up
• No startup chime, some video
activity, Apple logo, startup
spin dial
• Startup chime with possible
beep tones.
• Fan, hard drive spin or optical
drive reset sound
• Sleep LED is on , blinking or
went out
• Caps Lock LED toggles when
pressed
Deep Dive
1. Reset SMC.
2. Verify startup process passes initial memory
checks – no beep errors or flashing sleep LED
indicators. Display activity is starting up.
3. Clear PRAM. Verify starts up from user drive.
4. Connect known-good external bootable device
and press Alt key during startup then select
external startup device to bring up system for
diagnostics.
5. Verify presence and status of user hard drive. Use
Disk Utility to repair drive and file permissions.
Check Result Action Code
1. Reset SMC and Clear PRAM to
set default startup device to
internal hard disk drive (HDD).
2. Verify if system is indicating a
memory error with a repeated
1 or 3 flashes sequence of
sleep LED or beep tones (if
sound is enabled).
3. Reseat customer memory
and/or swap in knowngood
memory to isolate bad
memory and replace defective
parts.
Yes User hard drive bootable,
issue resolved default
settings.
No Customer system not starting
up. Go to step 2
Yes Troubleshoot memory issues.
Go to step 3
No Continue with startup
sequence verification. Go to
step 4
Yes Customer memory defective
and replaced. Continue to
verify startup process. Go to
step 4
No Should known-good memory
fail in one or more slots,
replace logic board.
X02
M07
MacBook Pro (15-inch, Mid 2010) Symptom Charts — Startup and Power Issues 28