Lenovo 7515L2U, Hardware Maintenance Manual

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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.
12. Install the new system board into the chassis by aligning the four mounting
studs in the chassis with the corresponding holes on the new system board,
and then carefully slide the new system board in to the chassis until it is
secured in place by the four mounting studs.
13. Install the heat sink and fan assembly retainer by aligning the four screw
holes on the retainer with the corresponding holes on the new system board,
and then tighten the screws to secure the retainer on the new system board.
14. Install the heat sink and fan assembly on the new system board. See
“Replacing the heat sink and fan assembly” on page 142. And connect the
heat sink and fan assembly cable to the new system board. See “Locating
parts on the system board” on page 129.
15. Install all memory modules and adapter cards removed from the failing
system board on the new system board.
16. Reinstall the hard disk drive. See “Replacing the hard disk drive” on page
136.
17. Reconnect the power and signal cables to the hard disk drive.
18. Reconnect all remaining cables to the new system board. See “Locating parts
on the system board” on page 129.
19. Go to “Completing the FRU replacement” on page 155.
Figure 61. Tabs on the microprocessor socket cover (bottom view)
Figure 62. Installing the microprocessor socket cover
148
Hardware Maintenance Manual