Apple MC408LL Apple Technician Guide - Page 42

to date Mac OS X 10.6.X. If, Check with ISP or Network

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3. Connect the computer to Yes Ethernet communication another Macintosh computer good. Go to step 4 using CAT5 Ethernet cable. See article . same make and model, replace logic board Can you connect successfully? 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 . Go to step 6 5. Check for MTU (Maximum Yes Go to step 6 Transmission Unit) issues. See article . Does changing the MTU settings on No Ethernet controller damaged. M10 Replace logic board. the computer resolve the issue? 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 M10 to date Mac OS X 10.6.X. If the issue persists, replace the logic board. 2010-08-03 Mac mini (Mid 2010) Symptom Charts - Communications 42

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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