TB16 HDMI connected monitor goes blank for few seconds every few hours

Hi,

Welcome to our community. Please make sure that the ports are intact and there is no loose connection. The screen going blank intermittently might be because of the lose ports.

Thanks for the reply but I do not believe it's due to lose ports. I switched from TB15 and I didn't have this issue prior to TB16. Just to be sure I just checked to connection again and it seems to be securely connected.

Thank you.

Hi,

Thank you for the update. Please click here find the steps to update the TB16 driver manually. Also, update the monitor driver from the support site.

Please click here to access the support site.

Click on view products=> select your monitor=> click drivers and downloads=> update the firmware for the monitor.

Let us know the results.

My XPS 15 9550 has all the latest drivers as I have been keeping it updated for TB15. There is some issue with the TB16 where the display connected to TB16 goes blank for few seconds and comes back. It's intermittent issue where I may notice this just few times the whole day and sometimes it happens once every few minutes for short period of time then stop doing it.

I didn't have this particular issue with the TB15 so this is definitely new issue that comes from the TB16.

Interference with the 1830 wifi card is sometimes blamed for TB3/USB-C problems. You might want to test if the issues persists with the wifi card in Airplane mode or disabled in Device Manager. At the same time you can test the stability of the wired Ethernet connection.

I just got my TB16 and am having the same problem with a monitor connected via Displayport to my XPS 9550. The entire connection to the TB16 seems to be lost for a few seconds, not just the monitor. I lose USB speakers and an external USB drive which are also connected through the TB16. I also have all the latest BIOS, firmware, and drivers.  However, I found the 1.2.19 bios was making this problem worse. I rolled back to 1.2.18.

Please be certain that you have completed all updates listed in this article.  Not updating can cause the issues  you describe above.   If you continue to have problems, please contact support with the service tag from your XPS system and explain the problem you are having.   They should be able to take appropriate action.

www.dell.com/.../SLN304347

Hi Brian B,

Thanks for the reply.

As I've indicated everything on my system is up to date. I've tried to download and install them again but it tells me I have the latest and install stops. Do I need to uninstall some things like Thunderbolt drivers and firmware from my laptop and reinstall?

I've tried to disable the wifi card on my XPS15 like someone suggested but I still saw the blank screen issue happen.

Are you going into airplane mode?    If so and still having problems, please send me a PM with contact information and your system service tag.

I did not enable "Airport mode" but I did turn off Wifi in Windows 10 system tray and disabled the "The Broadcom 802.11 Network Adapter provides wireless local area networking." card under the Network adapters.

I also turned off Wifi in the system tray, which reduced, but did not stop the monitor blanking. I've just enabled airplane mode. Will see if that does it.

Did airplane mode fix your monitor going blank?

Did anyone get to the bottom of this?  I am experiencing the same problems even after updating all the drivers.  I am connected via miniDP to a U3417W monitor and it is really getting annoying.  Sometimes it will go black for extended periods of time in the middle of doing work.  Any help would be greatly appreciated!