Mindray BeneVision N19, Service Manual

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4-4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual
4.7.2 Display Failures
Fault Symptom Possible Cause Countermeasure
Blank screen, but the
patient monitor still
operates normally
Cable defective or improperly connected 1. Verify the cable connecting the power switch and
the LED board to the front housing interface board,
the cable connecting the front housing interface
board to the coaxial cable of main control, and the
cable connecting the power module to the DCDC
board are properly connected.
2. Verify the connecting cables and connectors are
not damaged.
LCD defective Replace the LCD.
Secondary screen
does not function
Cable defective or improperly connected 1. Verify the cable connecting the display DP1
connector and the patient monitor is properly
connected.
2. Verify the cables and connectors are not
damaged.
DP cable of the secondary screen is not
inserted into the connector of the main unit
when the system is powered on
Power off the main unit. Connect the DP cable of the
secondary screen to the main unit. Then restart the
main unit.
Switch of the secondary screen is in the
power off state
Press the power-on button of the secondary screen
for 5s to start the secondary screen.
Touchscreen does not
respond
Touchscreen disabled
Check if there is a symbol shown above the
Main Menu QuickKey. If yes, press Main Menu for
more than 3s to enable the touchscreen.
Cable defective or improperly connected 1. Verify the cables connecting the touchscreen to
the touchscreen control board, the cable connecting
the touchscreen control board to the front housing
interface board, and the cable connecting the front
housing interface board to the main board are
properly connected.
2. Verify the cables and connectors are properly
connected
Touchscreen control board defective Replace the touchscreen control board.
Front housing interface board failure Replace the front housing interface board.