17-6 System Maintenance 
17.2  Troubleshooting 
If any persistent system malfunction is experienced, e.g. an onscreen error message, blank 
imaging screen, absent menus, please refer to the table below. If the failure can’t be eliminated, 
please contact Mindray Customer Service Department or sales representative.     
Troubleshooting Table 
After the AC power 
input is connected, 
the power indicator 
does not light on. 
  Abnormal power system 
or incorrect connection of 
the power cord. 
  Check if the system is plugged in.   
  Check if the system circuit 
breaker is in the Up position.   
  Check if the plug has not become 
loosened or dislodged from the 
back of the system.   
The power indicator 
of the monitor is 
light on, but image 
is blank. 
  The interval between 
turning off and restarting 
the system is too short – 
wait a minimum time of 
20 seconds. 
  The monitor brightness or 
contrast may be 
improperly set.   
  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.     
The monitor 
displays the 
characters and 
menus but no 
images. 
  The transmission power, 
overall gain or TGC 
controls are improperly 
set. 
  Check if 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. 
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 presets. 
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.