“I have owned this j5create (JCD397) for a few months without any issues. Recently, the monitors flicker on and off and sometimes alternate the cycle. Looking closely at the resolution, it gets really grainy while this is happening. What can I do?”
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That flickering/grainy behavior you’re seeing with your j5create JCD397 usually points to one of a few common causes. Cable or port wear – Over time, HDMI/DisplayPort connectors loosen or degrade, causing signal dropouts. Dock power limitations – If the dock or laptop is not receiving sufficient power, video output may flicker or degrade. Driver / firmware changes – Windows Updates or GPU driver updates can affect multi-monitor stability. Resolution/refresh mismatch – Running monitors at high refresh rates or mixed resolutions can cause instability. 1. Test with different cables/monitors - Swap HDMI/DP cables with known good ones. - Try a single monitor at a time → see if it stabilizes. 2. Check power supply -The JCD397 supports up to 100W PD passthrough. - Make sure your laptop’s charger is powerful enough (e.g., 90–100W). - If you’re using a lower-wattage adapter, the dock may cut power from displays intermittently. 3. Update drivers & firmware - Update your graphics drivers (Intel, NVIDIA, AMD). - Check Windows Update for USB-C / Thunderbolt drivers. 4. Resolution & refresh rate - Set monitors to 60 Hz temporarily. - Avoid running dual 4K at 60 Hz unless your laptop GPU supports it. 5. Test on another laptop - If the dock works fine elsewhere, issue is with your current laptop.
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