Apple mac pro early 2008 User Manual

							Mac Pro (Early 2008) Troubleshooting — Symptom Charts 171
Audio IO (front headphones) 
Start up the computer from a known-good volume (such as its Installation disc or an external 1. 
hard drive), 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. 
Reset PRAM2.  
Reseat front panel board 3. 
Replace front panel board 4. 
Replace logic board 5. 
Audio IO (rear audio line in; rear audio line out) 
Note: A red light shines from the rear optical audio-out connector, whether or not a device is 
connected to it. This is a normal condition.
Start up the computer from a known-good volume (such as its Installation disc or an external 1. 
hard drive), 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. 
Check Sound settings in System Preferences 2.  
Reset PRAM3. 
Replace logic board 4.  
						

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							Mac Pro (Early 2008) Upgrades — AirPort Extreme Card 17 3
AirPort Extreme Card
Important: The computer enclosure includes AirPort antenna wires and a Bluetooth antenna 
wire. The Bluetooth antenna wire looks similar to the AirPort antenna wires, except that it 
includes a “BT” label. For proper operation, be careful not to connect the Bluetooth antenna wire 
to the AirPort card or any AirPort antenna wire to the Bluetooth card. 
Note: You may connect the AirPort antenna wires to either AirPort card connector.
Tools
The only tool required for this procedure is a magnetized jewelers Phillips #1 screwdriver.
Preliminary Steps
Before you begin, open the computer, and lay it on its side with the access side facing up.
Part Location 
						

							Mac Pro (Early 2008) Upgrades — AirPort Extreme Card 174
Procedure
Connect the AirPort antenna wires to the connectors on the card. 1. 
Important: Be sure to connect the wires that are marked 1 and 3 to the card; the antenna 
wire that is marked 2 should be taped out of the way. 
Insert the AirPort Extreme card into its logic board connector at an angle, as illustrated. Then 2.  
lower the screw end of the card down to the standoffs on the logic board.  
						

							Mac Pro (Early 2008) Upgrades — AirPort Extreme Card 17 5
Install the two AirPort Extreme card mounting screws.3.   
						

							Mac Pro (Early 2008) Upgrades — PCI Express/Graphics Card 17 6
PCI Express/Graphics Card
The Mac Pro (Early 2008) 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: Combined maximum power consumption for all four PCI Express slots must not 
exceed 300 W.
Slot 1: Double-wide
PCI Express graphics
(graphics card installed) Slots 2–4: PCI Express
Tools
The only tool required for this procedure is a Phillips #1 screwdriver.
Preliminary Steps
Before you begin, open the computer, and lay it on its side with the access side facing up.
Note: You may also find it helpful to remove the hard drives and carriers and any adjacent PCI 
Express cards before beginning this procedure. 
						

							Mac Pro (Early 2008) Upgrades — PCI Express/Graphics Card 17 7
Part Location
Procedure
This procedure explains how to install a standard card and a card that includes a booster cable. 
Before you can install either type of card, however, you must first loosen the two captive screws 
that secure the PCI bracket to the enclosure and remove the bracket. You must also remove the 
port cover for the PCI slot where you are installing the new card.  
						

							Mac Pro (Early 2008) Upgrades — PCI Express/Graphics Card 17 8
Warning: When installing or removing a card, handle it only by the edges. Do not touch its 
connectors or any of the components on the card. 
Standard Card
Align the card’s connector with the expansion slot and press until the connector is inserted 1. 
all the way into the slot. If you’re installing a 12-inch card, make sure the card engages the 
appropriate slot in the PCI card guide. 
• Don’t rock the card from side to side; instead, press the card straight down into the slot.  
• Don’t force the card. If you meet a lot of resistance, pull the card out. Check the connector 
and the slot for damage or obstructions, then try inserting the card again. 
• Pull the card gently to see if it is properly connected. If it resists and stays in place and its 
gold connectors are barely visible, the card is connected. 
Replace the PCI bracket and tighten the two screws that secure it to the enclosure.2.   
						

							Mac Pro (Early 2008) Upgrades — PCI Express/Graphics Card 17 9
Card with Booster Cable
Connect the booster cable to the card. 1. 
Holding the card by the top corners, insert it straight down into its expansion slot. 2.  
Connect the booster cable to the logic board. 3. 
Note: There are two logic board connectors for booster cables. Connect the booster cable for 
a card in PCI slot 1 to the connector that is closest to the heatsink cover. Connect the booster 
cable for a card in PCI slot 2 to the connector closest to the media shelf. 
						

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