Apple MC408LL Apple Technician Guide - Page 76

USB Devices Not Recognized Quick Check Symptoms Quick Check USB Devices Not Recognized • USB wired keyboard/mouse not recognized • USB external drive not recognized • USB printer not recognized 1. For printers and external USB drives, make sure any external power source is plugged in and operating to isolate a power issue with the device. 2. The system has 4 USB ports on the rear of the computer. Make sure to try each port to isolate a particular port malfunction. 3. Test with a known good wired keyboard or mouse to isolate a failed peripheral issue. 4. Test with a known good USB cable when dealing with a printer or external USB drive, to isolate a USB cable issue. 5. Ensure that all available Software Updates have been applied to the computer for access to the latest bug fixes. Deep Dive Check 1. Unplug all USB devices from the computer except for the keyboard and mouse. Start the computer and reset PRAM. Are the keyboard and mouse recognized? 2. Did Bluetooth Mouse Setup assistant launch after startup? Result Yes No Yes Action Test in all USB ports to ensure all USB ports working as expected. Replace logic board for any port failures. Possible logic board failure. Go to step 2 Bluetooth detected via Internal USB, but external USB devices not recognized. Go to step 3 No Bluetooth not recognized via internal USB. Disconnect mouse and keyboard. Go to step 4 Code 2010-08-03 Mac mini (Mid 2010) Symptom Charts - Input/Output Devices 76