iMac (27-inch, Mid 2010) — General Troubleshooting 29
2010-09-09
Diagnostic LEDs
The iMac (27-inch, Mid 2010) computer has four built-in diagnostic LEDs on the main logic
board that can help you to troubleshoot the computer. The LEDs are located on the bottom
left edge of the logic board (under a piece of black mylar tape) and can only be seen when
looking through the lower vents of the enclosure. Refer to the next page for a close up graphic
of the troubleshooting LEDs.
Location of Diagnostic LEDs
The LEDs are located under the mylar tape, on the bottom, left corner of the logic board. They
can only be seen when looking through lower vents of rear housing