Part Location

To keep them out of the way, temporarily tape the antenna cables to the bottom of the media shelf. Important Be sure to disconnect all cables from the logic board before you remove the logic board mounting screws. 2. Starting at the back panel side of the logic board and working clockwise around the board, disconnect all cables from the logic board. Note There are 14 cables you will be disconnecting from the logic board. 3. Using a magnetized 1 Phillips screwdriver, remove the 11 black logic...

Led Efi Good

Normally on when DIAG_LED button is pressed. Takes approximately 5 seconds after power up. If this LED is on, it indicates that the computer has completed the on board Extensible Firmware Interface (EFI) operations and the operating system is now in control. Troubleshooting Check that LED 7 Power On LED is on. Check that LEDs 2, 3, 4, and 5 are off. Try removing any added hardware. Try removing any added DIMMs. Both of the memory riser cards include diagnostic LEDs for each DIMM. Each of the...

Internal Cabling Matrix

The table on the next page lists all Mac Pro (8x) internal cables that connect to the logic board and are not part of a larger subassembly. Following the table is a map of the logic board connector locations, which are listed in column 5 of the table. Serial ATA signals to from all four HDDs and main loqic board DC power to all four HDDs from main logic board 7-pin flat to sensor bd underneath HDD 1 7-pin flat to sensor bd underneath HDD 2 7-pin flat to sensor bd underneath HDD 3 7-pin flat to...

Led Gpu Present

Normally on when DIAG_LED button is pressed. If this LED is on, it indicates there is a graphics card installed and recognized by the computer. It does not indicate that the graphics card is fully functional. Some graphics cards require additional power to function, which is available from connectors on the logic board. For these cards, if the auxiliary booster power cable is not connected between the logic board and the graphics card, an error message reminding about this additional power...

Mac Pro Firmware Updates

Firmware is the name given to software that is written into memory circuits, such as flash memory, that will hold the software code indefinitely, even when power is removed from the hardware. Firmware on Intel Mac computers is designed to be updated if necessary through a software update. EFI and SMC firmware is stored on the Mac Pro 8x logic board. EFI firmware updates update the Boot ROM, and SMC updates update the System Management Controller firmware. The SMC manages fans and other...

Serial Number Location

The Mac Pro 8x serial number is located on the configuration label, directly below the configuration description. lt v Because Mac Pro 8x is a product configuration of the original Mac Pro, Mac Pro 8x computers do not have serial numbers distinct from Mac Pro serial numbers. There is also no separate Mac Pro 8x product pull-down list in GSX. When using a computer's serial number to look up Mac Pro 8x parts in GSX, be aware that you will receive a list of parts for both Mac Pro and Mac Pro 8x ....

Procedure

Disconnect the power cable harness connectors from the logic board. 2. Using a Phillips screwdriver, remove the two mounting screws on the power supply cable cover located at the back of the optical drive bay. 3. Slide the cover toward the top of the enclosure, tilt it up until the two tabs on the cover clear the slots in the media shelf, and remove the cover from the enclosure. Replacement Note Replace the cover at an angle so that the tabs engage with the slots in the media shelf. Then...

Sliding Door Covers Optical Drive Mac

Using a Phillips screwdriver, remove the two mounting screws on the power supply cable cover located at the back of the optical drive bay. 2. Slide the cover toward the top of the enclosure, tilt it up until the two tabs on the cover clear the slots in the media shelf, and remove the cover from the enclosure. Replacement Note Replace the cover at an angle so that the tabs engage with the slots in the media shelf. Then lower the cover into place. 3. Using a short-handled, magnetized 2.5 mm...

Unacceptable examples

The following are examples of unacceptable applications of the coating. Return new parts or replace existing parts that exhibit similar applications. I Void I I Void II I Splash I Void I I Void II I Splash Void I The silver-colored coating shows missing areas of within the normal coated area. Void I The silver-colored coating shows missing areas of within the normal coated area. Void II The silver-colored coating shows missing areas along the edge of the coated area. Splash The silver-colored...

Antenna Wire Connectors Mac

Imac Airport Antenne

Remove the two AirPort Extreme card mounting screws. 1. Remove the two AirPort Extreme card mounting screws. 2. Lift the AirPort Extreme card a short distance from the logic board. 3. Disconnect the AirPort antenna wires from the card. 4. Remove the card from the enclosure. Replacement Note To replace the AirPort Extreme card, do the following Connect the antenna wires to the card. Important Be sure to connect the wires that are marked 1 and 3 to the card the antenna wire that is marked 2...

Power Supply Verification

To power on, the computer's logic board requires trickle power. If the system fails to power on, first reset the SMC as described in this chapter. If the computer still doesn't power on, follow the procedure outlined below to determine whether the issue is related to the power supply. Diagnostic LED 1 indicates the presence of trickle power required by the logic board to begin the startup process. LED 1 should be yellow when the DIAG_ LED button is pressed, indicating that trickle voltage is...

I Iii lp

I Use the following table to interpret the LEDs. Use the following table to interpret the LEDs. Power supply is providing trickle power CPU B halts on an IERR instruction error CPU A halts on an IERR instruction error EFI has configured the graphics card Note There is a position on the logic board next to LED 1 for a SLEEP LED that does not have any LED installed. This is normal the LED was used only in development. To determine if a Mac Pro 8x computer is in sleep mode, watch the...

Mac Pro Fan Replacement

Mac Pro Removing Heat Sink Cover

Note The heatsink cover is held in place by a number of tabs and magnets on the underside of the cover. You must release the tabs before you can remove the cover from the enclosure. 1. Place the fingers of one hand under the lip of the heatsink cover nearest the logic board. Lift the lip slightly toward the media shelf to release the tabs and magnets under the top face of the cover. 2. With your fingers still under the cover's bottom lip, lift the cover straight up to release the remaining tabs...

PCI Express Graphics Card

The Mac Pro 8x logic board includes one double-wide PCI Express graphics slot and three PCI Express expansion slots, for a total of four slots. The computer comes with a graphics card installed in slot 1. You can install additional PCI Express graphics and expansion cards in the remaining three PCI Express expansion slots. Important Graphics cards from previous Power Mac G5 models are not compatible with Mac Pro 8x models. In addition, Mac Pro 8x graphics cards are not compatible with previous...

Mac Pro Assembly

Mac Pro Remove Fan Assembly

Using a long-handled, magnetized 1 Phillips screwdriver, remove the screw at the top rear of the front fan assembly that mounts the assembly to the logic board. 2. Remove the second Phillips screw at the bottom front of the assembly. 3. Place one hand on each end of the fan, lift straight up, and remove the fan from the enclosure. Replacement Note Before re-installing the front fan assembly in the enclosure, make sure that the fan cables are routed correctly in the fan channel. Replacement...

Air Port Extreme Card

AirPort Extreme Card does not appear to function and is not recognized by System Profiler 1. Start up the computer from a known-good volume such as an external hard drive with AirPort driver software installed, to isolate the issue to software or hardware. If the computer seems to perform adequately when booted in this way, troubleshoot as a software issue. If the computer continues to exhibit the issue, follow the steps below. 2. Reseat card and antenna cables connected to card AirPort Extreme...

Preliminary Steps

Open Mac Pro Fan

Before you begin, open the computer, lay it on its side with the access side facing up, and remove the following Hard drives and hard drive carriers in drive bays 3 and 4 Optical drive carrier and optical drives Any PCI Express cards that block access to the power supply mounting screws 1. Disconnect the power supply fan cable from the logic board and thread the cable through the opening in the media shelf. 2. Using needlenose pliers, pull out the four grommets that mount the power supply fan...

Take Apart

General Information 14 Orientation 14 Tools 14 Differences Between the Original Mac Pro and Mac Pro 8x 14 Opening the Computer 16 Hard Drives 18 Optical Drive Carrier and Optical Drives 21 Memory FB-DIMMs and Memory Riser Cards 25 AirPort Antenna Board with Cables 104 Optical Drive Power Cable 108 Optical Drive Data Ribbon Cable 111 Ambient Board 113 Ambient Board Cable 115 Bluetooth Antenna Board and Cable 117 Hard Drive Cable Harness 120 Hard Drive Temperature Sensor Cable 122 Hard Drive...

Startup Failures

When testing a computer for the following symptoms, remove the side access panel so you can better observe or listen for fan movement. Note Be sure to check the Memory and Power-On Self Test topics in the General Information section of this chapter. Incorrect installation of DIMMs or incompatible memory will not allow the system to start up correctly. For information on how to correctly install DIMMs, see the Memory DIMMs topic in the Take Apart chapter. Important For troubleshooting purposes,...

Safety and First Aid Guidelines

Below is a summary of safety and first aid measures for exposure to the coating on the processor heatsink and processor or the Krytox grease used in sealing the processor heatsink to the processor. For complete instructions, refer to the specific Material Safety Data Sheets MSDS included with the replacement parts. Avoid contact with eyes. Avoid contact with skin. Wash thoroughly after handling. Do not store or consume food, drink, or tobacco in areas where they may become contaminated with the...

Resetting the Logic Board

System Management Controller SMC Reset The System Management Controller SMC is a chip on the logic board that controls all power functions for the computer. If the computer is experiencing any power issue, resetting the SMC may resolve it. The SMC controls several functions, including Telling the computer when to turn on, turn off, sleep, wake, idle, and so forth Handling system resets from various commands It is also recommended that the SMC be reset after a logic board, ambient board, or...

Led Cpu B Lower Processor Error Led Cpu A Upper Processor Error

These LEDs come on if an error occurs or if the BootROM is corrupted. They do not depend on the DIAG_LED button being pressed. Related symptoms include no video or the computer is hung up. If the BootROM is corrupted, the optical drive tray should eject, prompting for the insertion of a recovery disc to restore the BootROM. With the computer booted, up press the SYS_RST switch. If this clears the CPU Error LED, check for incompatible device driver software that may have been...

Diagnostic LEDs

The Mac Pro 8x logic board includes a set of LEDs to help service providers troubleshoot the computer. The LEDs are located toward the rear of the logic board, under the memory cage, next to PCI card slot 1. You can view these LEDs by removing the computer's side access panel and looking through the memory cage to the logic board below. LEDs 2, 3, 4, and 5 are normally off and will automatically illuminate if an error occurs. To read LEDs 1, 6, 7, and 8, you must press the DIAG_LED button,...

Led Cpu B Lower Processor Overtemp Led Cpu A Upper Processor Overtemp

These LEDs come on if an error occurs. They do not depend on the DIAG_LED button being pressed. These two LEDs can operate in two different modes they will either flash or stay on. If either LED is flashing, it may indicate an initial processor over-temperature condition. If either LED is solidly on, it may indicate a chronic processor over-temperature condition. Initial processor over-temperature can cause symptoms such as sluggish computer performance. Chronic processor...

Mac Pro Cpu Heatsink

Disconnect the 2-pin cable for the upper processor CPU A heatsink from the logic board. 2. Using a long-handled, magnetized 3 mm flathead hex screwdriver, loosen the four captive mounting screws for the upper processor heatsink in the order indicated below. 3. Lift the heatsink straight up and out of the enclosure. 4. Disconnect the cable connector for the lower processor CPU B heatsink. 5. Using a long-handled, magnetized 3 mm flathead hex screwdriver, loosen the four captive mounting...

Identifying Version and Version Processors

There are two versions of the processor, Version 1 and Version 2, which must be replaced like-for-like. In addition, both processors in a dual configuration must be the same version, either Version 1 or Version 2. Different versions in the same computer could cause a system failure. Note You may still replace a single processor, but you must replace it like for like. There is no performance advantage to either version of the processor. To identify the correct processor for the computer you are...

Handling Instructions

Use these guidelines when handling the Mac Pro 8x processor heatsink and processor Wear disposable nitrile or latex gloves when handling the processor heatsink and processor. Avoid touching the silver coating on the underside of the heatsink and the top of the processor. Use care when removing the heatsink from the computer. As much as possible, lift the heatsink straight up off the processor. Use care when removing the processor from the logic board. Lift the processor out of the processor...

Memory FBDIMMs and Memory Riser Cards

Mac Pro Riser

The Mac Pro 8x computer has two memory riser cards with a total of 8 memory slots. On each card, the slots are arranged as two banks of two slots each. The computer comes with a minimum of 1 GB of memory, installed as a pair of 512 MB fully buffered, dual inline memory modules FB-DIMMs in two of the DIMM slots. Additional DIMMs can be installed in the open DIMM slots, as illustrated below. Note DIMMs must be installed in pairs of equal size from the same vendor. In the illustration below, DIMMs...