19-6 System Maintenance
 Troubleshooting Table
No. Failure Cause Measure
1 After the AC
power input is
connected,, the
AC power
status indicator
does not light
on.
Abnormal power system or
incorrect connection of the
power cord.
Verify that the plug has not
become loosened or dislodged
from the back of the system.
2 When the
power indicator
of the monitor is
on and image is
blank.
 The interval between
turnoff and restart is too
short – wait a minimum
time of 20 seconds.
 The monitor brightness
or contrast may be
improperly set (use
<Fn>+ Direction key to
adjust).
 Turn off the system and
wait a minimum time of 1
minute, and then restart the
system.
 Adjust the monitor
brightness and contrast
back to factory defaults.
3 The monitor
displays the
characters but
no images.
 The transmission power,
overall gain or TGC
controls are improperly
set.
 Verify that a probe is
connected and / or fully
connected.
 The system is in the
frozen status.
 Adjust the transmission
power, gain or TGC control.
 Ensure proper probe
connection.
 Unfreeze the image.
4 The image
quality is
degraded
 The exam mode is not
correct.
 The settings of the
image post processing
are not correct.
 The image presets are
inappropriate
 Select an appropriate
exam mode.
 Adjust the settings of the
image via post processing
or reset the post
processing to the default
values.
 Reset the factory default
setups.
5 The button is
responseless
with the system
buzzing
 There is too much dirt
blocking the button
 Check the control panel for
the button being blocked
and press it several times
to release it.
 Clean the button.
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