Connect a Smartphone to a 15.6 inches WIMAXIT TOUCHSCREEN portable monitor

Some Smartphones when connected to a 15.6 inches WIMAXIT  "Touchscreen"  portable monitor will not produce any output or any display , just a blank screen .   Some Smartphone  when connected to the  15.6 inches WIMAXIT  "Touchscreen"  portable monitor  will automatically produce a display or output , that means , it mirrors the Smartphone .   My guess is , certain brand of smartphones , or certain models of smartphones will produce a display automatically when connected to a  15.6 inches  WIMAXT  "Touchscreen"  portable  monitor  whereas  certain models or certain brands will not produce any display at all , just a blank screen . If there is no output or display when connected , I would suggest to connect a  Smartphone  Tablet/Charger to the  15.6 inches WIMAXIT  "Touchscreen" monitor to energize the  "Touchscreen" monitor or to give an extra power to the  "Touchsceen"  monitor .