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© 2009 Apple Inc. All rights reserved. 073-1254 Rev. A Processor Tray 10 Locate processor tray. 11 Press down and release 2 latches on front of processor tray. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 12 Holding tray by latches, lift it out of computer. 13 Place tray DIMM side up on soft, clean cloth. PCIe Fan 14 Locate PCIe fan. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 15 Remove 2 screws. 16 Slide fan up and out of computer. Processor Cage 17 Locate processor cage. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 18 Disconnect 3 cables from logic board. 19 Using long-handled Phillips #1 screwdriver, loosen 6 captive screws. 20 Rotate computer to stand vertically. Using 2.5 mm hex driver, remove 5 mushroom- head screws. 21 To release 2 latches holding front fan to cage, press down on bottom of cage while using flatblade screwdriver to release latch from top of cage. 22 Slide fan partway into cage, so that fan clears enclosure. 23 Repeat steps 4 and 5 for rear fan. Note: Processor cage includes two fans, one at each end of cage. Before removing cage from enclosure, you must release 2 latches on each fan and push fans partway into cage. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 24 Lift cage out of enclosure. Processor Cage Fans 25 Locate processor cage fans. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 10 26 Release fan cables from clips on bottom of processor cage. 27 Release 4 latches on front fan and slide fan out of cage. Note: Latch #4 is on inside of cage. 28 Repeat above step for rear fan. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 11 Installing the Replacement Fans 1 IPosition front fan in cage. 2 Slide fan back until it engages with the 4 latches. 3 Repeat above two steps for rear fan. 4 Re-insert fan cables in clips on bottom of processor cage. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 12 Processor Cage Important: Before you reinstall cage into enclosure, fans must be inserted partway into cage. 5 Position cage in enclosure. 6 Slide front and rear fans into place, so that they engage with latches. 7 Replace and tighten 5 mushroom-head screws. 8 Secure 6 captive screws. 9 Reconnect 3 cables. PCIe Fan 10 Slide fan into enclosure so that fan tabs engage with slots on metal cage. 11 Press down until fan clicks into place in connector. 12 Replace 2 screws. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 13 Processor Tray 13 Holding tray by latches, lower it into processor cage. 14 Make sure latches are closed flush with front of processor tray. Graphics Card 15 Reinstall graphics card in slot 1. Note: Align card’s connector with expansion slot and press down until connector is inserted all the way into slot. If installing a 12-inch card, make sure card engages correct slot in PCIe card guide. 16 If card includes booster cables, reconnect cables. 17 Slide PCIe fan to the right to lock card in place. 18 Replace PCI bracket and tighten screws. Note: Slide bracket under circled tab. © 2009 Apple Inc. All rights reserved. 073-1254 Rev. A 14 Hard Drive 19 Replace hard drive in far-left drive bay. Closing the Computer 1 Replace access panel. Note: Make sure latch is up before you replace panel. If latch is down, panel will not seat correctly. 2 Push latch down to close and secure access panel...

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