Apple 2009 iMac - Page 86

iMac (21.5-inch, Late 2009) Symptom Charts — Input/Output Devices 86
2010-11-18
FireWire Device Not Recognized
Unlikely cause: LCD display, power supply, hard drive, optical drive, fans
Quick Check
Symptoms Quick Check
FireWire Device Not Recognized
• FireWire hard drive not
recognized
• FireWire optical drive not
recognized
• FireWire camera not recognized
• FireWire printer not recognized
1. For external FireWire drives, make sure any
external power source is plugged in and
operating to isolate a power issue with the
device.
2. Test a known-good FireWire device to isolate a
failed peripheral issue.
3. Test a known-good FireWire cable to isolate a
FireWire cable issue.
4. Ensure that all software and rmware updates for
this model have been installed to take advantage
of any available bug xes.
5. Launch System Proler and verify if the aected
FireWire device is visible on FireWire bus. If yes,
then FireWire port and cable are functioning
properly. Contact FireWire device manufacturer to
verify that device is supported.
Deep Dive
Check Result Action Code
1. Unplug all FireWire devices
from computer. Reset PRAM.
Reconnect FireWire device
in question. Verify if FireWire
device is recognized.
Yes Issue resolved.
No Possible logic board failure.
Go to step 2.
2. Use a known-good FireWire
cable with a known-good
FireWire device (such as
another Mac in Target Disk
Mode). Verify if FireWire device
is recognized.
Yes Try FireWire device in question
with a known-good computer
of same model. Go to step 3.
No FireWire not recognized.
Replace logic board.
M12
3. Verify if FireWire device is
recognized on a known-good
same model computer.
Yes Go to step 4.
No Device may need additional
power. Use a powered FireWire
hub. Go to step 5.