Hillrom Welch Allyn Connex ProBP 3400, Service Manual, Page: 28 / 64

Symptom Possible cause Suggested action
Verify that the flex cable is
securely installed in J5 on the
main board.
The key panel is defective Replace the front housing.
The main board is defective Replace the main board.
The battery does not charge or
run time is low
The battery is defective Verify all external connections
and allow the battery to
charge for 6 hours. If the
problem persists, replace the
battery.
An internal connection is faulty Verify that the battery contact
harness is not damaged, is
installed with the correct
polarity, and is securely
connected to J2 on the main
board.
The main board is defective Replace the main board.
Display
Symptom Possible cause Suggested action
The display is blank or cracked,
or the backlight is not on
The display is faulty Replace the main board.
Communication
Symptom Possible cause Suggested action
A button does not respond
correctly
An internal connection is faulty Verify that the flex cable is
securely installed in J5 on the
main board.
The key panel is defective Replace the front housing.
The main board is defective Replace the main board.
Cannot communicate via the
USB connection
The device is off Verify that the device is
powered on.
The USB cable is faulty Replace the USB cable.
Incorrect PC configuration Test the connection by
connecting the device to a PC
running the service tool. Verify
that the service tool is
configured properly to
24 Troubleshooting
Welch Allyn® Connex® ProBP™ 3400 digital blood pressure device