Inspiron 3790 Service Manual

Procedure

Loosen the five captive screws on the base cover.
Remove the two screws (M2x2) that secure the base cover to the palm rest and keyboard assembly.
Remove the six screws (M2.5x7) that secure the base cover to the palm rest and keyboard assembly.
Pry the base cover starting from the top-left corner of the computer base.
Lift the base cover off the palm rest and keyboard assembly.
NOTE: The following steps are applicable only if you want to further remove any other component from your computer.
Disconnect the battery cable from the system board.
Press and hold the power button for 5 seconds to ground the computer and drain the flea power.