I solved it by checking out reddit.Even though you have the latest Intel Display drivers, you still need to install the control panel. From there you need to :One solution that instantly resolved the issue for me was:1. Opening the "Intel Graphics Command Center" program.2. Click on "Display" tab from the left menu3. Identify & Click on the deactivated screen, and click on the 3dots on it.4. Click "Enable"Very daft that you need to install extra software to enable monitors again.
Good day Installed a dozen Latitude 5530 12th Gen Intel laptops with- Dell WD19 Dock 130W- 2x SE2722H Dell Monitors Everyone has the same video cable configuration;  1x HDMI-to-HDMI & 1x DP-to-HDMI cable to connect both monitors to the docking station.I've ran the latest drivers from Dell support page and the machines are all up to date.I have one specific laptop that worked fine until the user rebooted. Both screens come up black, but switched on. Once the user unplugs the docking station and reconnects it, 1 screen comes back online, but not both. Under device manager both the monitors show, the problematic monitor is also switched on so no standby on the screen. The display settings show the 1 x active screen & 1x laptop screen. The problematic screen shows smaller and I'm not able to configure it.Any ideas to get it stable? it is not the cables.
Latittude 5530 monitors are both blank when rebooting while connected to WD19 
Dock 130W