Dell Inspiron 3668, Service Manual

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Removing the system board
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before
working inside your computer . After working inside your computer, follow
the instructions in After working inside your computer . For more safety best
practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance .
NOTE: Your computer’s Service Tag is stored in the system board. You
must enter the Service Tag in the BIOS setup program after you replace the
system board.
NOTE: Replacing the system board removes any changes you have made to
the BIOS using the BIOS setup program. You must make the appropriate
changes again after you replace the system board.
NOTE: Before disconnecting the cables from the system board, note the
location of the connectors so that you can reconnect the cables correctly
after you replace the system board.
Prerequisites
1 Remove the computer cover .
2 Remove the front bezel .
3 Remove the memory modules .
4 Remove the wireless card .
5 Remove the processor fan .
6 Remove the heat sink .
Procedure
NOTE: Note the routing of all cables as you remove them so that you can
reroute them correctly after you replace the system board. For information
on system board connectors, see “
System board components ’.
1 Disconnect the chassis-fan cable from the system board.
2 Disconnect the power-supply unit cable from the system board.
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