Dell Inspiron 15R (N5110, Early 2011) - Manual (Page 67)

System Board 67
Replacing the System Board
1 Follow the instructions in "Before You Begin" on page 9.
2 Replace the processor module (see "Replacing the Processor Module" on
page 80).
3 Replace the thermal cooling assembly (see "Replacing the
Thermal-Cooling Assembly" on page 76).
4 Follow the instructions from step 5 to step 7 in "Replacing the Hard Drive"
on page 73.
5 Turn the system board assembly over.
6 Slide the connectors on the system board into the slots on the computer
base.
7 Gently press the system board to connect the connector on the system
board to the connector on the I/O board.
8 Replace the five screws that secure the system board to the computer base.
9 Connect the speaker cable, to the connector on the system board.
10 Replace the hinge cover (see "Replacing the Hinge Cover" on page 55).
11 Replace the display assembly (see "Replacing the Display Assembly" on
page 43).
12 Follow the instructions from step 2 to step 7 in "Replacing the Palm-Rest
Assembly" on page 34.
13 Replace the memory module (see "Replacing the Memory Module(s)" on
page 20).
14 Replace the module cover (see "Replacing the Module Cover" on page 18).
15 Replace the battery (see "Replacing the Battery" on page 16).
16 Replace any cards or blanks removed from the 8-in-1 media card reader.
CAUTION: Before turning on the computer, replace all screws and ensure that no
stray screws remain inside the computer. Failure to do so may result in damage to
the computer.
17 Turn on the computer.
NOTE: After you have replaced the system board, enter the computer Service Tag
in the BIOS of the replacement system board.