T430 USB keyboard not working for HD password during boot

Ladies and Gentleman,
I have a large problem.
I use a T430 with a port replicator.
I need to set a Boot password and a HD Password.
When I boot the T430 in the port Replicator, the usb keyboard is not recognized and I had to open the T430 to enter the password.
I tried different Bios settings, nothing helped.
It seems to me that the keyboard drivers are not loaded at that time.
Before I had a W500 and a port replicator. Worked without problems.
Any help is welcome.
Ralf

Sorry. On my T430s, the USB3 port on the left starts faster than the always-on port on the back, so I hook a port replicator to that port. Is this the Lenovo port replicator or aftermarket? (I assume you are talking about a USB port replicator and not a docking station) Is the port replicator powered by an external power supply? I always plug in the power supply to the port replicator before I start the laptop.

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