 Apple Technician Guide - tim.id.au

2010-08-05
3. Start up from product OS
install disc or from an external
hard drive with product Mac
OS.
Are shutdown symptoms and
events gone while starting up
from this known-good Mac
OS?
4. Check system running on
battery only. Use known-good
charged battery.
Verify that shutdown/reset/
sleep issues disappear when
known-good battery is used
without AC adapter.
5. Check with known-good AC
adapter source only
Remove battery and use
known-good AC adapter.
Does the shutdown/reset/
sleep issue disappear with
known-good adapter?
6. Check if power removed error
reported “improper shutdown
detected” in system.log
If shutdown error is related
to power removed shutdown
cause, run ASD and check for
overvoltage sensor failure
reported.
Yes Shutdown events cease on
known-good OS. Reinstall
Mac OS on customer hard
drive and update OS with
latest version and check
if bootROM updates are
available.
No Symptoms unchanged - go to
step 4
Yes Recharge customer battery
and retest. Check for
customer battery health in
Apple System Profiler or run
battery testing utility, and
replace if reported battery
health is reported bad or
consumed.
No Symptoms unchanged - Go
to step 5
Yes Faulty adapter. Replace
customer AC adapter if AC
cable and duckhead were
confirmed faulty.
No Symptoms unchanged - Go
to step 6
Yes If voltage or current sensor
failure confirmed in ASD
w/known good DC and
batteries, replace logic board.
No Go to step 9
MacBook Pro (15-inch, 2.53 GHz, Mid 2009) Symptom Charts — Startup and Power Issues 40
P09
P14
MO8