I would
Check the physical connections between the keyboards and computer
Check that there is power to any midi interfaces and USB hubs in the path from keyboard to computer
If this does not find a problem
Power everything off and power it all up again. reboot the computer.
If HW complains that some devices are missing either select the option not to proceed or to temporarily mark them as offline otherwise you may lose some settings.
Check HW that your midi inputs from the console are still selected. If the are not select them. If they are not available to Hw then perhaps the driver in the OS is not working...
Difficult to give more advice not knowing your configuration...
Iain