Apple MD094LL/A Manuale Utente

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

 2010-09-09

1.  Verify if computer recognizes 

keyboard or mouse when 

plugged into rear USB ports on 

back of iMac.

Yes

Test device in all USB ports to 

ensure all other USB ports are 

working as expected.

Replace logic board if any 

USB port on rear fails.

Replace keyboard if any USB 

port on keyboard fails.

Go to step 2.

No

Go to 

 symptom flow.

2.  Verify if keyboard is working as 

expected.

Yes

Go to step 3.

No

Go to 

symptom flow.

3.  Verify if Mighty Mouse has an 

issue with scroll ball.

Yes

See 

.

No

Go to step 4.

4.  Verify if mouse has an issue 

with buttons.

Yes

Go to step 7.

No

Go to step 5.

5.  Verify if mouse has an issue 

with tracking.

Yes

Go to step 6.

No

Go to step 7.

6.  Try using mouse on another 

surface. Non-reflective, opaque 

surfaces without repetitive 

patterns work best. The surface 

should be clean but not shiny. 

Verify if mouse tracks correctly 

when used on another surface.

Yes

Surface issue. Issue resolved.

No

Go to step 7

7.  See 

. Verify if 

this article resolves issue.

Yes

Issue resolved.

No

Replace wired Mighty Mouse.