P2719HC, USB Type-C, background noise

* You mentioned, "This does not happen when using DP or HDMI.", which are video in ports. So was your question actually, " P2719HC, background noise inside when using USB Type-C video in connector.", and not referencing the usage of the two USB 3.0 downstream ports?

* If yes, to what PC is the P2719HC and its USB Type-C cable (C to C) connecting?
* What operating system?

* Can you record a video allowing us to hear this noise? Note, you should be recording from the standard 1 Meter/3 Feet from the face of the panel

Hello Chris,

I'm using the USB Type-C connection for video input from a Dell Laptop Latitude 5490. I'm connecting the USB Type-C cable provided with the P2719HC directly to the USB Type-C available on my Latitude. Under this circumstances, the noise appears. Find attached the video. I've got as well a Desktop PC connected with DP and when I use it through DP no any background noise appears. Some test I made is unplugged the USB 3.0 cable when I notice the noise and it stopped just after remove the cable. Please check video here, it's almost at the end.

By the way, seems that it's the same issue as described here.

So you are connecting like this =
Latitude 5490 left side USB 3.1/Type-C out port --> P2719HC USB Type-C (C to C) --> P2719HC USB Type-C in port

In the other thread, they were using the non-tested, non-validated Apple hardware. Also, none of them posted a video. You should be recording from the standard 1 Meter/3 Feet from the face of the panel.

I'm still facing the same issue, and It's really annoying.
These are the tests I've made during last days:

• Plugged monitor by Display Port or HDMI. RESULT: No any noise. This confirms it's something related with USB Type-C
• Connect my Latitude to monitor with USB Type-C disabling the video image and keep charging the laptop battery. RESULTS: Really low noise that can hardly heard when battery is full charged. Noise while battery is charging below 100%, (that's the scenario where video showed below has been recorded .  This could  confirms that It's  something related with chargind process .
• And finally, Latitude connected to monitor with Type-C with Video image on extended mode or only monitor makes noise that it's intermitent, It's not always the same level of noise and I can say that with monitor just powered on, noise is not appreciate. It starts after 5-10 minutes of powering on.

Please, check video I've recorded with the sound.

https://youtu.be/CUNifzq0O04

Thanks and regards

DO you think could be something related with USB Type-C cable? what do you thinkg about this tests?
Regards