Is this the “old“ model or the “new“ model with dvb-s2X tuners??
A config diagram would help
......and which version worked last??
Also have you been back through each tuner to see if it is setup correctly (and I am not saying you didn‘t set up correctly - on my Giga4K‘s and a new setup it can take a few reboots to get the tuners to stay as originally configured with mixed FBC and dvb-s2X)