Apple MD094LL/A Manuale Utente

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

 2010-09-09

3.  Verify if the charger LED will 

go green when a known-good 

set of partly charged NiMH AA 

batteries was installed and had 

been left for some hours (up to 

5 hours if a fully discharged set 

was installed in charger).  

Note: Status LED may turn 

OFF after charge has been 

completed more than an hour.

Yes

When charge of the known-

good batteries set has ended 

(status LED turned to green), 

insert them in a known-good 

input device and go to step 4.

No

LED remains amber (never 

ends charging): Replace 

defective Apple Battery 

Charger.

4.  Check Battery Level in System 

Preferences>Trackpad or 

Mouse Depending on device 

type, battery type, and time 

since last full charge, the 

battery level displayed should 

vary from 80% to almost full. 

Verify that battery level shows 

at least 80% charge.

Yes

 Charge functionality 

confirmed. Return Apple 

Battery Charger to customer 

and recommend customer to 

check rechargeable batteries.

No

Charger does not correctly 

charge batteries Replace 

defective Apple Battery 

Charger.

Uncategorized Symptoms
•  Unable to locate appropriate 

symptom code.

1.  Reset SMC.
2.  Verify that external I/O device (where applicable) 

works on a known-good, same-model computer.

3.  For third party I/O devices, make sure necessary 

software is installed and up-to-date, and that 

device is supported with user’s system.

1.  Verify if existing symptom code 

applies to issue reported by 

user.

Yes

Jump to appropriate 

symptom code flow.

No

Document reported failure 

and send feedback to 

stating that a suitable 

symptom code wasn’t found. 

Provide as much detail as 

possible.