Monitor flickers whenever I move away or towards my desk.

Understanding and Troubleshooting Monitor Flickering During Desk Movement

Experiencing display flickering can be a frustrating issue, especially when it seems to correlate with your physical movements around your workspace. Recently, a user encountered such a problem with a new Dell P2425H 100Hz monitor paired with an older IPS display, both connected to an RX 6600 graphics card. The flickering only occurred when moving towards or away from the desk, raising questions about possible causes and solutions.

The Setup

Dell P2425H 100Hz Monitor: Connected via DisplayPort.
Old IPS Monitor: Connected via HDMI.
Graphics Card: AMD RX 6600.
Additional Hardware: USB hub with a wireless headset dongle attached via USB-A to USB-B.

The Issue

The flickering phenomenon is triggered specifically when the user stands up from their office chair and moves away or towards the desk. The behavior is inconsistent but predominantly occurs when in motion, suggesting a possible link to the connection or interference affecting the monitors’ stability.

Troubleshooting Steps Undertaken

To address the issue, the user implemented several steps:

Removed the Wireless Dongle from the USB Hub
Switched Display Outputs: Moved DisplayPort and HDMI connections to different GPU ports.
Reconnected All Monitor Cables

Despite these efforts, the flickering persisted, indicating that the root cause might be related to signal interference, power supply stability, or connection quality.

Potential Causes and Recommendations

Given the described setup and symptoms, consider the following potential causes and solutions:

Electrical Interference: Movement-induced flickering can sometimes be caused by electromagnetic interference from nearby devices, especially when involving powered hubs and wireless peripherals. To mitigate this:
Identify and minimize sources of electromagnetic interference near your setup.
Use ferrite beads on cables if possible.
Cable Quality and Connection: Poor or loose connections can cause flickering.
Ensure all cables are securely connected.
Replace HDMI or DisplayPort cables with high-quality, shielded variants.
Grounding Issues: Inadequate grounding can lead to flickering.
Confirm that your power outlets and surge protectors are properly grounded.
USB Hub and Power Supply: Since the wireless headset is connected via a powered USB hub, consider:
Removing or relocating the USB hub to see if the issue persists.
Using a dedicated power source or