Laptop: Elitebook 840 G2
Docking station: Ultraslim D9Y32AA
OS: Windows 10 (64 bit)
New Monitor: BenQ BL2711U (Res: 3840x2160 at 60Hz)
Old Monitor: Samsung Syncmaster 2220WM (Res: 1920 x 1200)
Problem:
1. When new BenQ monitor is connected to either DisplayPort on the Docking Station -
there is NO SIGNAL to the monitor
1a. VGA cable can then be connected to docking station and it works fine with old monitor.
2. When BenQ monitor is connecteed directly to laptop's DisplayPort - monitor works perfectly.
2a. When laptop is merely docked (even though Monitor stays conn. directly to laptop)
SIGNAL LOST (puzzling)
2b. When VGA cable is connected to laptop (directly), it works with old monitor -
but SIGNAL IS LOST to BenQ connected via laptop's DisplayPort connection (puzzling)
Attempted solutions with BenQ Tech support - multiple reboots with connecting, disconnecting cable, etc. - problem persisted. Tech says he's heard of docking station "issues" suggested a "power issue" with docking station.
Attempted solutions undertaken with HP technician:
Updated the following drivers/firmware
Driver - Chipset (2)
Driver - Graphics (2)
BIOS - to version 01.18 Rev.A (18 Oct 2016)
Fiirmware: HP Ultraslim Docking Station DisplayPort (DP) Hub Firmware version 2.30.0000
After all the driver/BIOS installs, reboots, etc. PROBLEM PERSISTS exactly as above
So I know that Monitor and DP cable (at both ends) are OK. There is no software that comes with the monitor that could 'change' something (as HP tech suggested).
I see reports on this forum of similar (though not identical) problems, but no solutions.
Can this be an inherent problem with the docking station or laptop? Is there a reason to suspect that something is defective in either the docking station or laptop?
I can live with the inability to have both the BenQ monitor and the old monitor (VGA) working simultaneously.
But I don't like the need to constantly dock and undock/move the laptop depending on which monitor I want to use.
Many thanks in advance.