Apple 2009 iMac - Page 89

iMac (21.5-inch, Late 2009) Symptom Charts — Input/Output Devices 89
2010-11-18
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
System Proler 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 same USB port
of a same-model computer.
If other computer does not
require a powered USB hub
to allow functionality, replace
logic board.
M15
No Ensure all software and
rmware updates have
been applied for computer
and device. If issue persists,
contact device manufacturer
for support. The computer’s
USB ports and cable have
been veried.