User Guide

Mac mini Troubleshooting - 33
Symptom Charts
Display
Dim display, but computer appears to operate correctly
1. Check that the display is compatible with the Mac mini. Refer to Knowledge Base
article 300652: Mac mini: compatible Apple displays.
2. Check the brightness level in Display pane of System preferences.
3. Make sure that the monitor is turned on and has power. Make sure that the display's
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.)
4. Check that all video cable connections to the computer video port and to the monitor
are properly connected.
5. Examine the pins on the video cable connector to make sure they are not bent or
damaged in any way.
6. Connect a known working display (if you have an extra one available). If you see video
after doing so, replace your old display.
7. If the known-good display shows the same issue, replace logic board.
Scrambled or distorted video
1. Check that the display is compatible with the Mac mini. Refer to Knowledge Base
article 300652: Mac mini: compatible Apple displays.
2. Check connections on the back of the Mac mini.
3. Check that you are using the correct adapter (if necessary).
4. Try a known-good display. If the known-good display solves the issue, replace the
display.
5. If the known-good display shows the same issue, replace logic board.
Fan Failure
1. Remove the top housing and the internal frame.
2. Check fan cable connection to the interconnect board, and check cable for damage.
3. Replace fan.
4. Replace the interconnect board.
5. Replace logic board.