Apple MC408LL Apple Technician Guide - Page 78

Wired Keyboard Does Not Function Properly, Symptoms, Quick Check, Wired Keyboard Does

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2010-08-03 Wired Keyboard Does Not Function Properly Quick Check Symptoms Wired Keyboard Does Not Function Properly • Some or all keys on the keyboard don't work • Eject key or Caps Lock key doesn't seem to work • Some keys don't work as expected Quick Check 1. The system has 4 USB ports on the rear of the computer. Make sure to try each port to isolate a particular port malfunction. 2. Test with a known good wired keyboard to isolate a failed peripheral issue. 3. Test the keyboard on another Mac. If it works here, you may have bad USB port if the keyboard doesn't work at all, or a software issue if the keyboard is working but not as expected. 4. Ensure that all available Software Updates have been applied to the computer for access to the latest bug fixes. Deep Dive Check 1. Do any of the keys on the keyboard work? 2. Is the Caps Lock working as expected? 3. Is the media Eject key working as expected? 4. Open System Preferences > Speech. Is "Speak selected text when the key is pressed" enabled? Result Yes No Action Go to step 2 Go to USB Port Doesn't Recognize Devices symptom Yes Go to step 3 No Go to Keyboard: Specific keys do not respond symptom Yes Go to step 4 No To prevent accidentally ejecting media, Mac OS X adds a slight delay to the Media Eject key before it takes effect. Go to step 5 Yes The key combination to speak text cannot be used for any other purpose. Either disable, or change to a more rare key combination (including Shift, Command, Option and Control). No Go to step 6 Code M15 Mac mini (Mid 2010) Symptom Charts - Input/Output Devices 78

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Mac mini (Mid 2010) Symptom Charts — Input/Output Devices
78
2010-08-03
Wired Keyboard Does Not Function Properly
Quick Check
Symptoms
Quick Check
Wired Keyboard Does Not
Function Properly
•
Some or all keys on the
keyboard don’t work
•
Eject key or Caps Lock key
doesn’t seem to work
•
Some keys don’t work as
expected
1.
The system has 4 USB ports on the rear of the
computer. Make sure to try each port to isolate a
particular port malfunction.
2.
Test with a known good wired keyboard to
isolate a failed peripheral issue.
3.
Test the keyboard on another Mac. If it works
here, you may have bad USB port if the keyboard
doesn’t work at all, or a software issue if the
keyboard is working but not as expected.
4.
Ensure that all available Software Updates have
been applied to the computer for access to the
latest bug fixes.
Deep Dive
Check
Result
Action
Code
1.
Do any of the keys on the
keyboard work?
Yes
Go to step 2
No
Go to USB Port Doesn’t
Recognize Devices symptom
2.
Is the Caps Lock working as
expected?
Yes
Go to step 3
No
Go to Keyboard: Specific keys
do not respond symptom
3.
Is the media Eject key working
as expected?
Yes
Go to step 4
No
To prevent accidentally
ejecting media, Mac OS X
adds a slight delay to the
Media Eject key before it
takes effect. Go to step 5
4.
Open System Preferences >
Speech. Is “Speak selected
text when the key is pressed”
enabled?
Yes
The key combination to speak
text cannot be used for any
other purpose. Either disable,
or change to a more rare
key combination (including
Shift, Command, Option and
Control).
No
Go to step 6
M15