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

[Aracimia]

I've tried testing this, but no joy so far.

I believe should be able to reliably trigger this by the simple expedient of keeping my phone directly next to an affected unit and calling/texting it or simply waiting for it to poll the signal tower. Theres no Sim installed in this machine.

[Go_Bucks]

HP Worldwide TechServices was in to replaced the cpu sheilding on one of our units.  So far so good, but we are going to give it a week before servicing all of our systems.

[Corncob75]

Hi Aracimia,

We couldn't replicate it with an external phone, but with the internal 4g SIM it was easy to reproduce.

Your model may already have the MB that has the shielding applied?

[Corncob75]

We've had no issues since HP applied the shielding last Friday as per my post here:

http://h30434.www3.hp.com/t5/Notebook-Video-Display-and-Touch/External-Dual-Monitors-and-Laptop-scre...

We are now getting on site techs to attend each of our hospitals to apply the fix, 68 in total.

Fun for HP 🙂

[Aracimia]

O.k so I hadn't had much chance to look at this till today. But I managed to recreate this on an undocked G3. As is my wont I had my mobile propped up on the laptop itself as I was busying copying text from an error message I'd taken a snapshot of and the screen started flickering. Removed my phone and it stopped.

As a test I returned the phone to it's original position and for the next hour or so I got extremely sporadic brief cut outs on the screen.

Very suprised at this point. Checked the original laptops location, found the user kept a blackberry and an iphone almost right on top of the laptop

Again, I'm cautious of claiming that as the cause, but I'll run a few more tests and see if I can reliably recreate it

[Go_Bucks]

G3 has been solid after installation of the shield.  We are 100% confident in the fix.  Working with HP Level 2 to schedule fix on 44 units we have.  Everything we purchased, after the end of July, seems to already have the shield installed.

[SherryJ]

Is this still a solid fix?  We are having the same issues with our 850 G3 and 2013 UltraSlim Docks. 

[Corncob75]

Yep, since the shielding was applied we have had no further issue with corrupt video.

[SherryJ]

HP sent "me" the CPU Gaskets.  I did not think this was a user replaceable part. 

[SherryJ]

I spoke to Support and they said they also ordered new motherboards for the 3 cases I reported (I have many more but just wanted to start with 3).  The motherboards were on backorder, however I told them it was a bit premature to replace the motherboards until we have a chance to determine if the gasket corrects the blinking issue and they agreed.  I should have a tech here tomorrow.