Precision Mobile Workstations

Last reply by 08-26-2022 Unsolved
Start a Discussion
1 Copper
1 Copper

Third monitor not working on Precision 7550 and WD19DCS

I have Dell Precision 7550 connected to WD19DCS dock. Graphic card is Intel  UHD. Laptop LCD screen is disabled in Intel Command Center.

Until yesterday I had a three external monitors setup and working. DP and HDMI in dock and mini DP in laptop port. It all worked fine until I disconnected laptop from docking. After returning I can get signal from dock or from PC, but not from both. If I disconnect both HDMI and DP cables from dock, then mini DP from laptop starts working. All monitors and cables are good.

Does anyone know how to enable the mini DP port on laptop?

Reply (1)


I am checking to see if system restore resolved the issue Let us know.

Find your Service Tag

If still under warranty, click the "Get help now" icon on the right to start a live chat session. Currently only available in the USA.

Latest Solutions
Top Contributor