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Mac mini (Mid 2010) Symptom Charts — Communications 42
2010-08-03
3. Connect the computer to
another Macintosh computer
using CAT5 Ethernet cable.
See article <http://docs.
info.apple.com/article.
html?path=Mac/10.6/en/8429.
html>.
Can you connect successfully?
Yes Ethernet communication
good. Go to step 4
No If same Ethernet cable and
computer connects to a
known good computer of
same make and model,
replace logic board
M10
4. Check for speed and duplex
issues on the network. Open
System Preference > Network;
click the Advanced button,
then the Ethernet tab. Is the
speed and duplex reported
what is expected?
Yes Go to step 5
No Change the speed and duplex
settings. See article <http://
docs.info.apple.com/article.
html?path=Mac/10.6/
en/8711.html>. Go to step 6
5. Check for MTU (Maximum
Transmission Unit) issues.
See article <http://support.
apple.com/kb/HT2532>. Does
changing the MTU settings on
the computer resolve the issue?
Yes Go to step 6
No Ethernet controller damaged.
Replace logic board.
M10
6. If changing the speed,
duplex or MTU settings
allows connectivity, check
with another computer of
same make and model. Does
the known good computer
produce the same results?
Yes Check with ISP or Network
Administrator concerning
speed, duplex and MTU
settings.
No Verify with known good up
to date Mac OS X 10.6.X. If
the issue persists, replace the
logic board.
M10