Marantec M4500e RPM Sensor

Recently my M4500e opener would close and then kick right back up. The error code showed the RPM sensor needed replaced. I ordered new sensor installed and it still does the same thing. I’ve read other places about replacing the entire board otter’s have said it was the start and stop tabs on the belt (not sure what that means).
I’ve tried to reset open and close limits but the #1 and #8 led lights remain on.

Any help appreciated!

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While we try to help with all questions, note that Surety is an Alarm.com service provider and we provide support here for Alarm.com compatible products and services.

I’m not able to provide much support for incompatible product hardware replacement. The manufacturer would be a good resource for this question.It looks like this is a related support contacts page.