Monitor flickering after installing Windows 10

yunerpiao
yunerpiao Member Posts: 1 New User

I have two Acer monitors. One is R240HY, the other one is H236HL. I connect my laptop to these two monitors via VGA and HDMI respectively. Everthing was fine until I upgraded to Windows 10. 

Now, 

when I connect R240HY to my laptop via VGA and H236HL via HDMI, the monitor R240HY is flickering (I hope I used the right word. I can see horizontal lines/waves on the screen). The monitor H236HL works fine. 

 

when I connect R240HY to my laptop via HDMI and H236HL via VGA, the monitor R240HY shows a message "no signal" and the monitor H236HL works fine. 

 

They both work normally when each of them is connected to my laptop via HDMI. 

 

I am not sure if there are some issues with my monitor(s) or the OS, or anything else. 

 

Thank you in advance!