Safety Precautions - Dell Latitude 9520 Series Service Manual

NOTE: If the AC adapter is not disconnected from the system, a message prompting you to remove the AC adapter is
displayed on the screen.
5. Once the system has powered down, you can proceed to perform replacement procedures.
6. To exit Service Mode connect the AC adapter and press the power button to power on the system. The system will boot up
and return to normal functioning mode.

Safety precautions

The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or
reassembly:
● Turn off the system and all attached peripherals.
● Disconnect the system and all attached peripherals from AC power.
● Disconnect all network cables, telephone, and telecommunications lines from the system.
● Use an ESD field service kit when working inside any tabletnotebookdesktop to avoid electrostatic discharge (ESD) damage.
● After removing any system component, carefully place the removed component on an anti-static mat.
● Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.
8 Working on your computer