Can you swap the working module with the new one and see if it works fine in the known good slot. Next, try the working module in the other slot. If its a HW fault this way we can narrow down if its a faulty slot or card.
In case the above excercise doesn't help, please do post the exact module part number and the IOS version in use.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...