Lenovo ThinkCentre 7515 Maintenance Manual page 110

Figure 18. Tabs on the microprocessor socket cover (bottom view)
Figure 19. Installing the microprocessor socket cover
12. Install the new retention module on the new system board.
13. Install the heat sink and fan assembly and connect the heat sink and fan
14. Install the new system board into the chassis and align the screw holes with
15. Install all memory modules and adapter cards removed from the failing
16. Reinstall the primary hard disk drive with the hard disk drive cage.
17. Reconnect all remaining cables to the system board. See "Locating parts on the
18. Go to "Completing the FRU replacement" on page 120.
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Hardware Maintenance Manual
b. Insert the tabs 1 of the socket cover into the hinged side of the socket,
and then press the other side of the socket cover downward until the tabs
2 snap into position.
assembly cable to the microprocessor fan connector on the new system board.
those in the chassis. Insert and tighten the screws to secure the new system
board in place.
system board on the new system board.
system board" on page 89.