marivic_manzanillo2000 :
what will i do if my monitor turning into black? they still on but the light of monitor is off. how can i troubleshoot this matter?
Verify your cable connections between the computer and the monitor.
Check the refresh rate selected in your GPU's control panel and ensure it's not beyond the supported range of your monitor.
If possible, hook the monitor up to another computer and see if the same problem occurs.