Sounds like APM is not sending the mavlink data - check to ensure you've set all the correct parameters for minimosd to work, check that the correct signal wire is going to the OSD.
Try to connect on telemetry - if the OSD screen appears then, you need to recheck the APM parameters for OSD.
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Sounds like APM is not sending the mavlink data - check to ensure you've set all the correct parameters for minimosd to work, check that the correct signal wire is going to the OSD.
Try to connect on telemetry - if the OSD screen appears then, you need to recheck the APM parameters for OSD.