Apple 2009 iMac - Page 34

iMac (21.5-inch, Late 2009) Symptom Charts — Startup and Power 34
2010-11-18
2. With known-good AC power
cord and AC outlet, Verify if
system continues to restart or
shutdown
Yes Go to step 3.
No AC power cord / outlet issue.
Issue resolved.
X03
3. Disconnect hard drive power
cable from hard drive and
startup the computer from
other bootable media (like
Install DVD, a same model
computer in Target Disk Mode,
or a compatible known-good
OS on an external drive). Verify
if system continues to restart or
shutdown.
Yes Go to step 4.
No
Possible bad software or hard
drive. Go to Hard Drive Not
Recognized symptom ow.
4. Inspect and reseat AC inlet
connection to power supply
(the smaller of the 2 cables
connected to power supply),
and DC power cable from
power supply to logic board.
Verify if damage is observed on
the cables or connectors.
Yes Replace damaged cable.
Retest. Return to step 1 if
problem continues.
X03
No Go to step 5.
5. Install known-good power
supply. Verify if system
continues to restart or
shutdown.
Yes Reinstall original power
supply. Go to step 6.
No Issue resolved with power
supply replacement.
P02
6. Replace DC power cable,
which supplies power to
logic board, hard drive, and
LED backlight board. Verify if
system continues to restart or
shutdown.
Yes Go to step 7.
No Issue resolved with DC power
cable replacement.
X03
7. Replace logic board. Verify if
system continues to restart or
shutdown.
Yes Use Minimum Conguration
troubleshooting to isolate
failed module.
No Issue resolved with logic
board replacement.
M08