@tinybentley bonox is probably referring to my video here:
Which is where I was leading you towards. You need the "lsiutil" program. That said, it is usually unlikely the ports are turned off on an internal card. This happens more often on external port cards because they were used in a storage device in "target" mode. nonetheless, you can verify the connection status with lsiutil. If that just shows there's no connection, the next step would be to check the physical SAS lanes on the card. what often gets damaged are the coupling capacitors along the SAS lane so look closely at those. 99% of the time if they are damaged it is visible if you look closely, the other 1% requires you measuring the farads to see if it meets spec even though they look fine.