Dell Inspiron 15-5578 Service Manual page 13

Figure 2. Removing the base cover
a. plastic scribe
b. palm rest and keyboard assembly
c. base cover
4. Disconnect the battery cable from the system board.
NOTE: Disconnect the battery cable only when you continue to remove other components from your computer.
Figure 3. Disconnecting the battery cable
a. battery cable
Removing the base cover 13