External Dual Monitors and Laptop screen issue EliteBook 840/850 G3 and 2013 UltraSlim Dock

[SherryJ]

Need a Snickers Bar?

[someone123]

"WWAN connectivity allows a user with a laptop and a WWAN card to surf the web, check email, or connect to a virtual private network (VPN) from anywhere within the regional boundaries of cellular service."

cellular service is the key... Do you have a cell phone within 10 feet of the device SherryJ? (In your pocket?) Try moving it away from the device and see if you have the problem. I would also be interested in hearing what provider you have for cell service. (Tmobile, sprint, at&T, etc)

[SherryJ]

I am well aware of what WWAN is used for but I guess my question is if the driver is installed (not needing to be) will that still cause an issue or does it have to be set up and using a SIM card.  We have 600+ customers and even if their cell is on the table behind them, it would be withing 10 ft.  Staff provided cell phones are Verizon and I really don't know what mix of those reporting issues has Verizon.  Would it be effective to disable or remove the WWAN adapter?  I have not taken the time to go through the BIOS to see if that is an option on the 820, 840 and 850 G3's.

[someone123]

My understanding of the issue is that any cellular device can cause interference. Be it the internal Cell (WWAN) or an actual Cell Phone. Doesn't matter if you disable the internal if you have a cell phone near the device, both can cause the issue.

[SherryJ]

Not good ... HP has to fix this.  The IT staff and other support staff use of cell phones is a necessity for certain security features.  Can't wait until corncob75 reports back next week. 

@corncob75 - what are the "new components" on the MB that HP is bringing to you?  Student123 says the issue will happen (correct me if I am misstating this) the issue will happen if the WWAN is active and using a SIM or if you have a cell within 10 ft. 

[skriddles]

Any news?????

Sorry if I overlooked an entry, but has anyone tried connecting the monitors directly to the laptop to see if the problem persists? Also, if you got a new mainboard with the additional capacitors to prevent "bridging" of the processor with cellular signals, did that permanently solve it?

"Intermittent blinking" is the best way to describe the behavior of the dual monitors, though it is a very slow blink, like my cat does when sleepy. And the monitors don't always "blink in sync".

System details:

Windows 7
Elitebook 840 G3, purchased 2016

HP EliteBook Laptop Docking Station (D9Y32UT#ABA) as seen at http://store.hp.com/us/en/pdp/hp-2013-ultraslim-docking-station

Dual HP monitors connected via DisplayPort cables to the dock