iMac (27-inch, Mid 2010) Symptom Charts — Communications 91
2010-09-09
4. Check for speed and duplex
issues on network. Open
System Preference > Network;
click the Advanced button,
then the Ethernet tab. Verify if
the speed and duplex reported
are what is expected.
Yes Go to step 5.
No Change 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
kBase #HT2532: Mac OS X:
How to change the MTU for
troubleshooting purposes.
Verify if changing MTU settings
on computer resolves issue.
Yes Go to step 6.
No Ethernet controller damaged.
Replace logic board.
M10
6. If changing speed, duplex
or MTU settings allows
connectivity, check with a
known-good, same-model
computer. Verify if known-good
computer produces the same
results.
Yes Check with ISP or Network
Administrator concerning
speed, duplex & MTU settings.
No Verify with known good OS.
If issue persists, replace logic
board.
M10
Wireless Input Device Does Not Pair
Quick Check
Symptoms Quick Check
Wireless Input Device Does Not
Pair
• Can’t get system to recognize a
Bluetooth keyboard, mouse or
trackpad
1. Check computer with a known-good Bluetooth
input device to test computer side.
2. Test Bluetooth device side with a known-good
computer, with up-to-date Mac OS 10.6.x with
installed Bluetooth device driver.
3. Ensure that device is being used within 30-foot
range for Bluetooth devices.
4. See kBase #HT1365 AirPort potential source of
interference.