Apple Mac mini Late 2009 (Technician Guide) - Manual (Page 67)

Mac mini (Late 2009) Symptom Charts — Input/Output Devices 67 2009-11-03
FireWire Devices Not Recognized
Quick Check
Symptoms Quick Check
FireWire Devices Not Recognized
FireWire external drive not •
recognized
FireWire printer not recognized
•
For external FireWire drives, make sure any 1.
external power source is plugged in and
operating to isolate a power issue with the
device.
Test with a known good FireWire device to isolate
2.
a failed peripheral issue.
Test with a known good FireWire cable to isolate
3.
a FireWire cable issue.
Ensure that all available Software Updates have
4.
been applied to the computer for access to the
latest bug fixes.
Deep Dive
Check Result Action Code
Unplug all FireWire devices 1.
from the computer. Start the
computer and reset PRAM.
Reconnect the FireWire device
in question. Is the FireWire
device recognized?
Yes Issue resolved
No Possible logic board failure.
Go to step 2
Use a known good FireWire 2.
cable with a known good
FireWire device (another
Mac in FireWire Target Disk
mode is good). Is this device
recognized?
Yes Try the FireWire device in
question with a known good
computer of the same make
and model. Go to step 3
No FireWire not recognized.
Replace main logic board.
M12
Is the FireWire device 3.
recognized on a known good
computer of the same make
and model?
Yes Test the FireWire device with
a known good cable on user’s
computer. Go to step 4
No FireWire device may need
additional power. Use a
powered FireWire hub. Go to
step 5