Power Supply Upgrade Guide

Chapter 1 Introduction
3
WARNING Before removing the cover, always disconnect the power cord
and unplug telephone cables. Disconnect the power cord to
avoid exposure to high energy levels that may cause burns
when parts are short-circuited by metal objects, such as tools
or jewelry. Disconnect telephone cables to avoid exposure to
shock hazard from telephone ringing voltages.
WARNING The power switch does not turn off the standby power.
Disconnect the power cord to turn off standby power. If the
backlight on the LCD display is still on, standby power is still
on.