Apple MD094LL/A Manuel D’Utilisation
iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices
105
2010-09-09
3. Verify if a known-good USB
keyboard and mouse are
recognized.
Yes
Test original USB mouse and
keyboard. Replace if still not
recognized. Go to step 5.
No
External USB ports not
functioning. Replace logic
board.
M15
4. With no USB devices
connected, restart computer.
Verify if Bluetooth Mouse Setup
assistant launches after startup.
Yes
Bluetooth detected.
Go to step 3.
No
Bluetooth not recognized.
Internal and external USB not
functioning. Replace logic
board.
M15
5. With known-good USB
keyboard and mouse working,
test USB peripheral in question
(USB hard drive or printer, etc.)
Verify if device is recognized
in Apple System Profiler under
USB.
Yes
Device recognized. Test in all
USB ports to ensure all USB
ports working as expected.
Replace logic board for any
port failures.
M15
No
Device may require more
power than supplied by USB
ports. Test with a powered
USB hub. Go to step 6.
6. Verify if using a powered USB
hub resolves the issue.
Yes
Test device on the same
USB port of a same-model
computer without any other
USB port populated. If other
computer does not require
a powered USB hub to allow
the device functionality,
replace logic board.
M15
No
The computer’s USB ports
and cable have been verified.
Ensure all software and
firmware updates have
been applied for computer
and device. If issue persists,
contact device manufacturer
for support. .