3. Verify if a known-good USB

Yes

Test original USB mouse and

 

keyboard and mouse are

 

keyboard. Replace if still not

 

recognized.

 

recognized. Go to step 5.

 

 

 

 

 

 

No

External USB ports not

M15

 

 

functioning. Replace logic

 

 

 

board.

 

 

 

 

 

4. With no USB devices

Yes

Bluetooth detected.

 

connected, restart computer.

 

Go to step 3.

 

Verify if Bluetooth Mouse Setup

 

 

 

No

Bluetooth not recognized.

M15

assistant launches after startup.

 

Internal and external USB not

 

 

 

 

 

 

functioning. Replace logic

 

 

 

board.

 

 

 

 

 

5. With known-good USB

Yes

Device recognized. Test in all

M15

keyboard and mouse working,

 

USB ports to ensure all USB

 

test USB peripheral in question

 

ports working as expected.

 

(USB hard drive or printer, etc.)

 

Replace logic board for any

 

Verify if device is recognized

 

port failures.

 

in Apple System Profiler under

 

 

 

No

Device may require more

 

USB.

 

 

power than supplied by USB

 

 

 

 

 

 

ports. Test with a powered

 

 

 

USB hub. Go to step 6.

 

 

 

 

 

6. Verify if using a powered USB

Yes

Test device on the same

M15

hub resolves the issue.

 

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.

 

 

 

 

 

 

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. .

 

 

 

 

 

2010-09-09

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices  105

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Apple MD094LL/A manual M15, Bluetooth not recognized