4-6          BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual 
4.6.5 Output Interface Failures 
Failure Description  Possible Cause  Troubleshooting 
No output for the nurse 
call signal
 
Internal module rack 
COM board defective
 
Replace the internal module rack COM board. 
Main control board 
defective
 
Replace the main control board. 
Cable defective or 
improperly connected
 
 
Verify the cable connecting the main control 
board to the internal module rack COM 
board is connected reliably.
 
 
Verify the connecting cables and connectors 
are not damaged.
 
Logic exception of the 
internal module rack 
COM board
 
Upgrade the logic of the internal module rack 
COM board.
 
USB Device Unusable. 
Main control board 
failure
 
Replace the main control board. 
Network interface failure 
Main control board 
failure
 
Replace the main control board. 
DVI interface failure 
Display not matched 
with the DVI interface 
time sequence
 
Use the recommended display. 
Main control board 
defective
 
Replace the main control board. 
Touch screen failure of 
the external display
 
External display model 
not specified in the 
manual
 
Use the display model recommended in the user 
manual.
 
Touch pad damage of 
the external display
 
Replace the display. 
Touch pad firmware of 
the external display 
inconsistent with the 
system software
 
Contact the display manufacturer to fix the 
problem.