Tianqi Posted July 21, 2016 Share Posted July 21, 2016 Error 400 is usually caused by multiple monitors plugged into the PC. Make sure that the link box is plugged into the same graphic card with the main monitor. You can change which is the main monitor in right click – display settings. If it is still not working, unplug other monitors. Try updating the graphics driver as well. Link to comment Share on other sites More sharing options...
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