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HP Elitebook 8470P and HP2012 90W Docking Station Issues

HP Recommended
Elitebook 8470P
Microsoft Windows 10 (64-bit)

It appears that my 8470P doesn't work correctly with my HP 2012 90W docking station.  When the laptop is connected to the docking station with the docking stations power supply connected when powered on via the switch on the dock the laptop powers on but only gets as far as the HP logo, no further.   What also happens is this seems to trigger a memory module issue (causing the CAP LOCK and NUM lock keys to blink 3 times?  However with the laptop connected to the docking station and the docking stations power supply removed the laptop boots fine, and when the power supply to the dock is re-connected all works fine?  So there seems to be an issue with the docking station power supply when starting the connected laptop from a fully shutdown state (8470P) with the dock power supply connected?  I'm confused, hopefully someone out there has a solution for this..... Hopefully

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