HP Elitebook Folio 9470M Dual Display Port with 2013 Ultraslim Docking Station Not Working

[Evan319]

I have a home office with dual displays and a HP 2013 UltraSlim Docking Station. From the docking station, I am running two Display Port to DVI cables to each monitor. When docking my HP 9470m, I am unable to extend the displays, mirroring occurs on each monitor. When I unplug one of the Display Port cables from the dock and plug it into the side Display Port on the actual computer, the displays extend as expected.

When I dock a different HP laptop, 840 G3 for example with the display port cables each plugged into the dock, the external displays extend as expected. I have read that there was a significant change after the 9470m model with regards to the graphics that might explain the situation above. I am wondering if someone could confirm that this is the case or recommend something for the 9470m that could be upgraded to remedy this issue. Selected computer specs below.

Thank you,

---HP 9470m---

OS Name Microsoft Windows 10 Pro
Version 10.0.18363 Build 18363

System Model HP EliteBook Folio 9470m
System Type x64-based PC

Processor Intel(R) Core(TM) i5-3427U CPU @ 1.80GHz, 2301 Mhz, 2 Core(s), 4 Logical Processor(s)
BIOS Version/Date Hewlett-Packard 68IBD Ver. F.73, 4/12/2019

Name Intel(R) HD Graphics 4000

Adapter Type Intel(R) HD Graphics Family, Intel Corporation compatible

Driver Version 10.18.10.5069

---HP 840 G3---

OS Name Microsoft Windows 10 Pro
Version 10.0.17763 Build 17763

System Model HP EliteBook 840 G3
System Type x64-based PC

Processor Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2496 Mhz, 2 Core(s), 4 Logical Processor(s)
BIOS Version/Date HP N75 Ver. 01.29, 6/4/2018

Name Intel(R) HD Graphics 520

Adapter Type Intel(R) HD Graphics Family, Intel Corporation compatible

Driver Version 21.20.16.4550