Monitor Only not supported after changing resolution

Gogito

Commendable
May 26, 2016
9
0
1,510
So I'm outputting the display from my laptop to my tv monitor using a vga cable. Extended and duplicate mode works fine but monitor only doesn't after I accidentally changing the resolution of the monitor. Now, whenever I select monitor only I will just get mode not supported. Anyway I can change the resolution of the monitor again ?