monitor displays only with onboard graphics card

metahard

Honorable
Feb 17, 2015
23
0
10,510
i was using sapphire hd 7730 ddr5.suddenly my monitor is not displaying anything .the blue light of monitor is beeping .i switched my vga cable from external graphics card to integrated graphics card then the monitor starts to showing display .

however the external graphics card's fan is spinning

[update]
yesterday I was trying to trying to turn on my monitor with my external graphics card .it started and stayed well for the evening (I also played some games) then at night i turned of my pc and in morning i tired to turn on it then again it isn't starting .