The following actions may resolve or at least help isolate the root cause of the problem:
Note1: there are a few cards that do not have Hot Swap button and you will not need to take that step for those cards.
If neither of 1,2 or 3 does not resolve, we need to consider RMA the card module.
If only 1 and 2 fails but 3 works (I mean, the card works in a different chassis), we need to consider RMA just the chassis controller.
Please raise a ticket with support and provide the details of your test using the guiadance above, provide as much details as you can as well as all possible logs (Diagnostic Report, Chassis Logs, etc)
If you're signed in to the CSC, you can access the Spirent TestCenter Hardware Reference for further details.