What is making compatibility issue in miracast in Elitebook 840 G1.

[DasVi]

I am trying to resolve the miracst compatibility of my Hp laptop with grundig tv.

1. I have an asus A555LA and Hp Elitebook 840 laptops asus works fine with tv were as elitebook fails after connection attempt.

2. If I make my asus lap as projector elite book can connect to it means that I have only compatibility issue with Tv.

3. Updated the drivers to the latest from intel site itself and still there is no improvement 

4. Thought the problem could be from the hardware compatibility of intel and grundig tv and changed the intel wifi adaptor with qualcomm  from asus laptop and  the problem is still the same 😲 

Could anyone please give an insight on what could be creating the compatibility issue here.

"netsh wlan show drivers" gives Wireless Display Supported: Yes (Graphics Driver: Yes, Wi-Fi Driver: Yes)  for both the cards

I have tried with WDS in ubuntu as well so solution from linux perspective also welcomed(https://github.com/intel/wds) 

Thanks in advance.

[DasVi]

With elite book 840 G5 I could connect to the TV without any issues.

But I can't try swapping the wireless cards because their slots are different. 

Here is my out put of netsh wlan show drivers

Interface name: WiFi

Driver : Intel(R) Dual Band Wireless-N 7260
Vendor : Intel Corporation
Provider : Intel
Date : 29/04/2019
Version : 18.33.17.1
INF file : oem20.inf
Type : Native Wi-Fi Driver
Radio types supported : 802.11b 802.11g 802.11n 802.11a
FIPS 140-2 mode supported : Yes
802.11w Management Frame Protection supported : Yes
Hosted network supported : Yes
Authentication and cipher supported in infrastructure mode:
Open None
Open WEP-40bit
Open WEP-104bit
Open WEP
WPA-Enterprise TKIP
WPA-Enterprise CCMP
WPA-Personal TKIP
WPA-Personal CCMP
WPA2-Enterprise TKIP
WPA2-Enterprise CCMP
WPA2-Personal TKIP
WPA2-Personal CCMP
Open Vendor defined
Vendor defined Vendor defined
Authentication and cipher supported in ad-hoc mode:
Open None
Open WEP-40bit
Open WEP-104bit
Open WEP
WPA2-Personal CCMP
Wireless Display Supported: Yes (Graphics Driver: Yes, Wi-Fi Driver: Yes)

[DasVi · Accepted solution]

One of great support center staff Adithya Resolved the issue. 

After remote connection he did a firmware and driver update on intel and windows using HP SoftPaq DownloadManager and that resolved the issue.