Dell Inspiron 7390 2n1, 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 base cover .
2 Remove the battery .
3 Remove the solid-state drive .
4 Remove the wireless card .
5 Remove the fan .
NOTE: Remove the heat sink from the system board only when you want to replace the system board. To replace the
keyboard, power button with fingerprint reader, and palm-rest and antenna assembly, remove the system board
assembly along with the heat sink.
6 Remove the heat sink .
Procedure
1 Remove the three screws (M2x3.5) that secure the left display hinge to the system board.
2 Lift the left display hinge from the system board.
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Removing the system board 49