Teledyne LeCroy LabMaster 9Zi-A - Manual (Page 15)

Getting Started Manual
922157-00 Rev A 7
Always use the Standby button or the File > Shutdown menu option to
execute a proper shut down process and preserve settings before powering
down. Do not shut down by pulling the power cord from the socket or
shutting off a connected power strip.
The Standby button does not disconnect the oscilloscope from the AC
power supply. The only way to fully power down the instrument is to use
the rear Power switch (if available), or unplug the AC power cord from the
outlet.
We recommend unplugging the instrument if it will be unused for a long
period of time.
CAUTION. Do not change the instrument’s Windows Power Options setting
from the default Never to System Standby or System Hibernate. Doing so
can cause the system to fail.