Dear Sir,
Can you please provide me with a serial number?
It looks like the boards were delivered to you for ML605 long ago, they are out of warranty.
One of the workaround would be to use KC705, it uses 2.5V Vadj.
You received your FMC204s at the time VC707 was not yet existing and you are expecting these boards to be compatible with the VC707, that does not make much sense to me.
Best Regards,
Arnaud