Dell Area 51 not booting up when Kensington SD3500v is plugged in

I have a Dell Area 51 desktop running Windows 10 that won't boot up when I plug in a Kensington  SD3500v port replicator (AKA Docking Station), but once booted up I can plug the port replicator and move the monitor, mouse and keyboard to the SD3500v and everything works fine. It seems to fail only when I boot up either from cold (Off stage then turned on) or warm (Windows Restart).  

I checked the BIOS and it shows A10 which seems to be the last one listed by Dell.com/support 

I reached out to Kensington and they recommended I contacted Dell support but I am out of warranty so I will get no support. 

I know the SD3500v is OK because 3 other laptops work just fine.  When plugged to it they all boot up as expected, it is only the Desktop Are 51 that won't boot up. 

Again, once booted up and plugged back into the port replicator it all works fine. Speaker, printer, keyboard, mouse, monitors, camera.  Any peripheral plugged to the SD3500v will work just fine. 

I appreciate any help. #WontBootWithSD3500v