Apple mac mini User Manual
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2 - Mac mini Troubleshooting General Information Power Adapter Serial Number
Mac mini Troubleshooting - 3 General Information Thermal Pad The thermal pad is located on the bottom housing. A new thermal pad is included with the logic board and the bottom housing, and the pads can be ordered separately as a kit (part number 922-6749). Replace the pad when: • the logic board or the bottom housing is replaced • the pad is torn, withered, or damaged Important: Never use thermal paste in place of the thermal pad. You must replace the thermal pad with a new identical pad. Procedure 1. Remove the original pad from the bottom housing or the logic board using a black stick or other nonconductive nylon tool. 2. Remove the protective backing on the new thermal pad. Note: Avoid unnecessary contact with either side of the thermal pad as dirt and body oils reduce the thermal pads conductivity. 3. Place the new thermal pad on the bottom housing (as shown). Make sure the thermal pad has even contact with the bottom housing. There should be no air pockets. 4. Replace the logic board.
4 - Mac mini Troubleshooting General Information Ports The Mac mini ports are shown below. The Mac mini ports shown with the modem plug in place.
Mac mini Troubleshooting - 5 General Information DVI to VGA Adapter The Mac mini comes with a small DVI to VGA adapter in the box. This adapter allows you to use your Mac minis DVI port with a VGA-compatible display. Replacement adapter If you need to replace the DVI to VGA adapter that came with your Mac mini, this Apple DVI to VGA Display Adapter (model M8754G/A) is functionally equivalent, and can be purchased through the Apple Store. This is the same adapter that came with some other Macintosh computers. Other adapters You can also use Apples DVI to Video Adapter (model M9267G/A), which outputs S-Video and Composite video, allowing you to connect your Mac mini directly to a television or older projector.
6 - Mac mini Troubleshooting General Information Compatible Apple Displays The Mac mini has a DVI-I port on the back of the computer that allows you to connect any display that uses a DVI interface. In addition, the Mac mini comes with a DVI to VGA adapter (shown below), if you prefer to connect a VGA monitor to your Mac mini. If you connect a DVI monitor to the Mac mini, it can display digital resolutions up to 1920 x 1200 pixels, depending on your monitor. If you use the included DVI to VGA adapter, the display port supports analog resolutions up to 1920 x 1080 pixels, depending on your monitor. The following Apple displays can be used with a Mac mini: Table 1: Compatible Displays Display Name Marketing Part NumberDisplay Connector Type Compatible? Apple Cinema HD Display (23-inch DVI) M9178LL/A DVI Compatible Apple Cinema Display (20-inch DVI) M9177LL/A DVI Compatible Apple Cinema HD Display (23-inch flat panel) M8537LL/A ADC Use DVI to ADC adapter Apple Cinema Display (20-inch flat panel) M8893LL/A ADC Use DVI to ADC adapter Apple Cinema Display (22-inch ADC) M8058LL/A ADC Use DVI to ADC adapter Apple Studio Display 21 M6204LL/A VGA Use included DVI to VGA adapter Apple Studio Display 17 (ADC) M7649LL/A ADC Use DVI to ADC adapter Apple Studio Display 17 M6221LL/A VGA Use included DVI to VGA adapter
Mac mini Troubleshooting - 7 General Information The following Apple displays are not compatible with a Mac mini: Refer to Knowledge Base article 300652 for updates to this table. Apple Studio Display LCD (ADC) M7928LL/A ADC Use DVI to ADC adapter Apple Studio Display LCD (DVI) M7612LL/A DVI Compatible Apple Studio Display LCD M6356LL/B VGA Use included DVI to VGA adapter Table 2: Displays that are not Compatible Display Name Marketing Part NumbersDisplay Connector typeCompatible ? Apple Cinema HD Display (30-inch DVI) M9179LL/A DVI NOT compatible Apple Cinema Display (22-inch) M7478LL/A DVI NOT compatible Table 1: Compatible Displays Display Name Marketing Part NumberDisplay Connector Type Compatible?
8 - Mac mini Troubleshooting General Information Memory Specifications and Upgrades Mac mini computers have a single memory slot. This slot accepts a standard PC2700 or PC3200 184-pin DIMM with the following specifications: • PC2700 or PC3200 Synchronous DRAM (SDRAM) • 2.5 volt • 8-byte • non-parity • 64-bit wide • 184-pin module • maximum of 16 memory devices on the DIMM • unbuffered—do not use registered or buffered SDRAM • maximum height of 50 mm Using PC3200 memory does not provide additional speed benefits. Although the Mac mini supports PC3200 DIMMs, the PC3200 RAM will operate at PC2700 (333 MHz) speeds. The Mac mini has a 256 MB base memory configuration, which can be expanded up to a maximum of 1 GB. The Mac mini can be configured to order (CTO) with 512 MB or 1 GB of SDRAM. Additional memory should be installed by an Apple Authorized Service Provider. Video memory The Mac mini has 32 MB DDR of soldered SDRAM dedicated for video. Video memory cannot be upgraded. LED status The Mac mini has a power light located on the front of the computer in the bottom right corner below the optical drive slot. The LED displays a steady light, no light, or pulses, depending on the computers status. Heres what the Mac minis LED is telling you. Table 3: Mac mini LEDs Model Startup Normal OperationDisplay Sleep ModeEnergy Saver Mode Mac mini steady white steady white steady white pulsing white
Mac mini Troubleshooting - 9 General Information How to Clean Your Mac mini Follow these general rules when cleaning the outside of your Mac mini: • Use a damp, soft, lint-free cloth. Avoid getting moisture in any opening\ s. • Dont use aerosol sprays, solvents, or abrasives. Warning: Do not use acetone, alcohol, or any alcohol-based cleaner on your computer. Never spray cleaner directly onto your computer. Liquid could drip inside the case and cause an electrical shock. • Be sure to unplug the power adapter from the wall or power strip before \ you clean it. Procedure To clean the Mac mini case, do the following: 1. Turn off the computer. 2. Disconnect the power cord and all accessory devices from the computer. 3. Wipe the surfaces lightly with a clean, soft cloth dampened with water.
10 - Mac mini Troubleshooting Reset the PMU Reset the PMU How to Reset the PMU The Power Management Unit (PMU) is an integrated circuit (computer chip) typically found on a computers logic board. As its name implies, the PMU is responsible for managing all aspects of the computers power. It controls hard disk spin down, sleep and wake, some charging aspects, and how any devices attached to the computer affect sleep. If the settings in the PMU become corrupted, it can result in operational anomalies such as your computer not turning on, not displaying video, or not waking from sleep, among other things. In these situations, you may need to reset your computers PMU. Resetting the PMU will not resolve issues in which the computer stalls or is unresponsive. A PMU reset should only be used as a last resort in the case of a hardware failure or when the power management system is suspected. Resetting the PMU returns the computer hardware, including NVRAM, to default settings and forces the computer to shut down. Before you reset the PMU, try restarting the computer instead, which may resolve the issue. If the computer has stopped responding, try these steps, in order, until the computer responds: • Force Quit (Option-Command-Escape) • Restart (Control-Command-Power) • Force Shut Down (press the power button for 10 seconds) If none of the above steps resolved the situation, reset the PMU. Reset the PMU with the Top Housing On 1. Unplug all cables from the computer, including the power cord. 2. Wait 10 seconds. 3. Plug in the power cord while simultaneously pressing and holding the power button on the back of the computer. 4. Let go of the power button. Your computer should start up. Important: This procedure also resets the computers PRAM. Be sure to reset your computers time, date, and other system parameter settings as necessary. If none of the above steps resolved the situation, reset the PMU. Follow the procedures on the next page.
Mac mini Troubleshooting - 11 Reset the PMU Reset the PMU with the Top Housing Off You can also reset the PMU by directly pressing the PMU reset switch located on the logic board. Follow these steps to access the PMU reset switch on the logic boar 1. Unplug all cables from the computer. 2. Remove the top housing. 3. If necessary, remove the internal frame to access the battery. 4. Measure the voltage of the battery in the battery holder. The battery should measure 2.6V to 3.0V. If the battery does not have minimum voltage, replace the battery. After replacing the battery, wait 10 seconds and then reset the PMU (refer to the next step). If the battery voltage is good, go on to the next step. 5. Press the PMU switch on the logic board, located in the rear right corner of the machine. Be sure to press it just once. Because of the restricted space, you may need to use a black stick to press this switch. Warning: Do not press the PMU reset switch a second time because it could adversely affect the PMU chip. 6. This procedure also resets the computers PRAM. Be sure to reset your computers time, date, and other system parameter settings as necessary.