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Why is Palette Master Ultimate (PMU) unable to properly and consistently detect a monitor in a multi-monitor setup?


Make sure the monitor is connected to your computer via USB-C or HDMI/DisplayPort plus a USB upstream-capable cable, and set PROJECTION or Multiple Displays to Extended mode on your computer.

Then, re-click the PMU icon in the system tray, then go to Connected devices, then Check connected devices to manually detect and connect the monitor.

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