We are going in circles here. With the 3690 installed the z400 will not boot to anything SSD, HDD, USB (front or back), or CD. I am not trying to boot to the Win10x64PRO that was installed on the SSD with the 3520. I do not think that would work because the CPUs are different. I imagine that during install windows installs drivers for the specific CPU it sees.
There is no OS install and no way to install one without a boot device. The USB was recognized for the replication that was successful, but that’s all.
The work station itself is fully functional, because when the 3520 is installed it works just fine. It boots, recognized all my drives and all my applications work.
Once at the flashing curser only turning it off works. It doesn’t even recognize CTRL + Alt + Delete.
I have an install USB. I’ll try the DVD to see if that makes any difference, but it would not boot to my universal diagnostic CD.
I believe I have a 3690 that has failed in a very unusual way.
I still do not understand why anyone would select a 5690, designed for a dual processor board over a 3690 for installation on single processor board, unless of course the 3690 is known as a faulty CPU, but I have seen z400 advertised with 3690 installed.