Dell Latitude 5340 Intel Core i5-1335U Docking Station Dual Monitor Not Working Fix

The Dell Latitude 5340 is a business ultrabook designed for docking station use in office environments. When connected to a Dell dock or universal USB-C dock, some users find that one or both external monitors are not detected, show a black screen, or only one of the two connected displays works.

This guide walks through the most effective fixes for dual monitor issues through a docking station on the Dell Latitude 5340 with the Intel Core i5-1335U processor.

Why Dual Monitors May Not Work Through the Dock

• Thunderbolt or USB-C firmware not updated on the dock
• Intel graphics driver not supporting the required number of display streams
• Dock connected to a USB-A port or non-Thunderbolt USB-C port
• Monitor cables or connections on the dock not seated correctly
• Display resolution or refresh rate exceeding what the dock can output

Step-by-Step Fixes

Fix 1: Connect the Dock to the Thunderbolt 4 Port

Only the Thunderbolt 4 port on the Latitude 5340 provides enough bandwidth for dual external displays through a dock. The regular USB-A or USB-C 3.2 port will not support two monitors simultaneously:

1. Identify the Thunderbolt 4 port on the left side of the laptop (marked with a lightning bolt icon).
2. Connect the dock cable directly to this port.
3. Allow Windows 30–60 seconds to detect all displays after connecting.

Fix 2: Update the Intel Thunderbolt and Display Driver

Both drivers must be current for the dock to output to multiple displays:

1. Open Device Manager and update the Intel Thunderbolt Controller driver under System devices.
2. Also update the Intel Iris Xe Graphics driver under Display adapters.
3. For the correct versions, visit the Dell Support page with your Service Tag.
4. Restart after installation and reconnect the dock.

Fix 3: Update the Dock Firmware

Dell and third-party docks receive firmware updates that improve display detection and bandwidth management:

1. For Dell WD docks, download Dell Dock Firmware Update Utility from the Dell Support page.
2. Connect the dock, run the updater, and follow the on-screen instructions.
3. The dock will restart after the firmware update and reconnect automatically.

“Both monitors appeared immediately after updating the dock firmware. Before the update, only one display was detected no matter what I tried.”
— Hairul, systems administrator

Fix 4: Reduce Monitor Resolution or Refresh Rate

Some docks cannot output two high-resolution displays simultaneously at maximum settings. Try the following:

• Set both monitors to 1920×1080 at 60Hz as a test.
• If both displays appear, gradually increase resolution one monitor at a time to find the maximum the dock supports.
• Refer to the dock specifications for maximum dual-display resolution support.

Fix 5: Run Dell Command Update

Dell Command Update ensures all device drivers are at the latest recommended version. Download it from the Dell Support page, run it, and install all available driver and firmware updates for the Latitude 5340. Restart and test dual monitor functionality through the dock again.

Frequently Asked Questions