Depending on the trigger signal polarity setting of the 12-pin connector on the back of the camera, no image will be output if no trigger signal is applied.
Check the trigger signal polarity (via the rear DIP switch or communication settings).

DIP Switch Setting (No. 6):
OFF: Positive polarity (High)
ON: Negative polarity (Low)

If no trigger signal is input through the 12-pin connector, the trigger polarity must be set to positive polarity (High).
When the trigger polarity is set to negative polarity (Low), the camera remains in trigger-waiting mode and no image will be output.