Before Working Inside Your Computer - Dell Latitude 7420 Service Manual

5. When the ready-to-proceed message appears on the screen, press any key to proceed. The system emits three short beeps
and shuts down immediately.
Once the system shuts down, you can perform replacement procedures without disconnecting the battery cable from the
system board.
To exit Service Mode, connect AC adapter and press the power button to power on the system. The system will automatically
return to normal functioning mode.

Before working inside your computer

About this task
NOTE: The images in this document may differ from your computer depending on the configuration you ordered.
Steps
1. Save and close all open files and exit all open applications.
2. Shut down your computer. Click Start >
NOTE: If you are using a different operating system, see the documentation of your operating system for shut-down
instructions.
3. Disconnect your computer and all attached devices from their electrical outlets.
8 Working on your computer
Power > Shut down.