Solved: Flickering after connect InFocus IN2114 Projector to Dell Latitude 3510 laptop

Problem

I have a Dell Latitude 3510 laptop running Windows 11 with all updates installed. When I attempt to connect InFocus IN2114 projector to the laptop via VGA port using an HDMI-to-VGA converter cable, the screen flickers. However, when I connect a different laptop to the same projector, it works properly.

The InFocus IN2114 Projector supports a maximum resolution of 1280×1024. After disabling and re-enabling the NVidia driver, the projector worked for some time; however, it began flickering again after restarting.

It appears that the issue is linked to the display drivers. This laptop has both NVidia and default graphics cards. Previously, when I attempted to disable NVidia graphics card and only enable the default graphics card, the projector was not receiving any signal.

After re-enabling the NVidia driver, the flickering on the projector stopped and the display appeared correctly. However, after changing the display settings to 1280×1024, the flickering resumed. I reverted the settings back, yet the flickering persisted.

I would greatly appreciate any assistance to resolve this issue.

Solution 1

1280×1024 is not a native resolution for laptop screens. It is not recommended to duplicate the monitors as flickering may occur. Instead, it is recommended to extend the monitors. With extended monitors, each monitor can have its own resolution and the laptop screen can be set to its native resolution of either 1920×1024 or 1366.

Solution 2

It is possible that this could be a BIOS or driver issue. Dell has recently released several new drivers over the last couple of weeks and many more over the past two months. I recommend double-checking this to ensure the latest drivers have been installed. It is not always possible to rely on Windows Update for the most up-to-date drivers.

Solution 3

The issue surrounding the flickering screen had resurfaced, and after thoroughly assessing the situation, we determined that the VGA-to-HDMI converter cable was the source of the problem. In order to resolve the issue, we replaced the converter with a new one, and thankfully the flickering stopped and the desired results were achieved. We believe that the converter was not working properly, which caused the issue to be present. This was an isolated incident, and going forward, we will be regularly inspecting the converter cables to ensure they are in working order.