E4990A Help
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becomes inoperable.
The front panel key or
keyboard becomes inoperable.
• Using the mouse, turn System
> Key Lock > Front Panel &
Keyboard Lock OFF.
The touch screen becomes
inoperable.
• Using the front panel keys,
press System > Key Lock >
Touch Screen & Mouse Lock
OFF to turn OFF the lock.
• Execute the calibration of the
touch screen.
The mouse becomes
inoperable.
• Using the front panel keys,
press System > Key Lock >
Touch Screen & Mouse Lock to
turn OFF the lock.
All of the front panel keys,
keyboard, and mouse become
inoperable.
• Confirm that the keyboard or
mouse is connected correctly.
When it is connected
correctly, turn OFF the power
once, and restart the system.
The keyboard and mouse have
been connected after power-on.
• Turn OFF the power once, and
restart the system. When
taking all these measures
does not recover operability,
there is a possibility of a
failure.
The screen freezes and all
operations become impossible.
The measurement in progress
or screen update is stalled and
all of the front panel keys,
keyboard, mouse, and touch
screen are inoperable.
• Press the standby switch to
turn OFF the power once, and
restart the system.
The system freezes while in
operation.
• Press the standby switch to
turn OFF the power once, and
restart the system.
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