Apple mac pro early 2008 User Manual

Mac Pro (Early 2008) Take Apart — PCI Express/Graphics Card 31
Replacement Note for Card Using One Booster Cable: Be sure to connect the card’s booster 
cable to the correct auxillary power connector on the logic board. Connect the booster cable for 
a card in PCI slot 1 to the lower connector. Connect the booster cable for a card in PCI slot 2 to 
the upper connector.
Replacement Note for Card Using Two Booster Cables: Connect both cables to the two 
auxillary power connectors. 

Mac Pro (Early 2008) Take Apart — Power Supply 32
Power Supply
Tools
The only tools required for this procedure are a magnetized 2.5 mm hex wrench and a long-
handled, magnetized Phillips #1 screwdriver.
Preliminary Steps
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 drive• s
Any PCI Express cards that block access to the power supply mounting...

Mac Pro (Early 2008) Take Apart — Power Supply 33
Procedure
Using a Phillips screwdriver, remove the two mounting screws on the power supply cable 1. 
cover located at the back of the optical drive bay. 
Slide the cover toward the top of the enclosure, tilt it up until the two tabs on the cover clear 2.  
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...

Mac Pro (Early 2008) Take Apart — Power Supply 34
Using a short-handled, magnetized 2.5 mm hex wrench, remove the four power supply 3. 
mounting screws from the bottom of the media shelf. 
Release the four power supply cables from their hook-and-loop fasteners on the enclosure.4. 
Depress the locking latch on each cable connector and disconnect the four power supply 5. 
cables from the four connectors on the power harness cable.  

Mac Pro (Early 2008) Take Apart — Power Supply 35
Slide the power supply toward the front of the computer. 6. 
Lift the power supply and cables out of the enclosure. 7. 
Replacement Note: When replacing the power supply, be sure to slide it toward the back of the 
computer as far as possible. The power receptacle must align with the opening in the enclosure’s 
back panel and the four screw holes in the power supply must align with the screw holes in the 
media shelf. 

Mac Pro (Early 2008) Take Apart — Power Supply Fan 36
Power Supply Fan
Tools
The only tools required for this procedure are needlenose pliers and scissors or wire cutters 
(optional)
Preliminary Steps
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 drive• s
Any PCI Express cards that block access to the power supply mounting screw• s
Power suppl•...

Mac Pro (Early 2008) Take Apart — Power Supply Fan 37
Procedure
Disconnect the power supply fan cable from the logic board and thread the cable through 1. 
the opening in the media shelf. 
Using needlenose pliers, pull out the four grommets that mount the power supply fan to the 2.  
media shelf divider. 
Note: You may find scissors or wire cutters useful in snipping off the grommet heads.  

Mac Pro (Early 2008) Take Apart — Power Supply Fan 38
Rotate the fan and remove it from the enclosure.3.  

Mac Pro (Early 2008) Take Apart — Power Supply Fan 39
Replacing the Power Supply Fan
Place the power supply fan in the media shelf and thread the fan’s cable through the 1. 
opening in the shelf.
Connect the cable to the logic board.2.  
Rotate the fan into place flush against the media shelf divider. Make sure the back of the fan 3. 
faces the divider, as illustrated. 
  

Mac Pro (Early 2008) Take Apart — Power Supply Fan 40
Note: To secure the power supply fan to the divider, use the long-tailed grommets enclosed 
with the replacement fan. 
Thread the first grommet, tail first, through one of the four grommet holes in the divider 4. 
and on through the corresponding grommet hole in the fan bracket. Then pull to secure the 
grommet and detach the excess threading tail. ( The tail is notched to break off at the correct 
place.) 
Repeat for the other three grommets. 5.