User Guide

Mac mini Troubleshooting - 13

Symptom Charts

How to Use the Symptom Charts

The Symptom Charts included in this chapter will help you diagnose speciﬁc symptoms

related to the product. Because cures are listed on the charts in the order of most likely

solution, try the cures in the order presented. Verify whether or not the product continues

to exhibit the symptom. If the symptom persists, try the next cure.

Note: If you have replaced a module, reinstall the original module before you proceed to

the next cure.

No Power

The Mac mini won’t turn on, no startup chime, no drive or fan sound, maybe

no power on LED

1. Make sure that the power cord is plugged into a working wall outlet, and that it's

properly connected to the power adapter. (To check if the wall socket is working, plug

in a lamp or other electrical device.)

2. Make sure that the power adapter is properly connected to the power port on the back

of the computer.

3. Disconnect all accessories that are plugged into the computer, such as a printer, hub,

or iPod.

4. Reset the PMU. (Refer to Reset the PMU mentioned in this chapter.)

5. Check and reseat the internal connectors. Note: If the fan connector is disconnected,

the unit will quickly ﬂash the LED and shut off.

6. Try plugging a different power cord into the computer (if you have a working one

available). If the computer starts up, replace the old power cord.

7. Try connecting a different power adapter to the computer (if you have a working one

available). If the computer starts up, replace the old power adapter.

8. Replace the logic board.