Apple MD094LL/A Manuale Utente

iMac (27-inch, Mid 2010) — General Troubleshooting 

2010-09-09

1.  Unplug the computer. Allow several minutes for power supply to discharge.

2.  Remove logic board.

3.  Remove coin battery for 1-2 minutes. The coin battery is located on the back side of the logic 

board (see graphic below). 
 

4.  Measure DC voltage on battery touching battery with red probe, and grounding with black 

probe. If voltage is 2.7v or less, replace battery.

5.  Reinstall the battery and logic board. This will reset the logic board.

6.  Power on computer.

7.  If computer boots, check for and install all software and firmware updates.