VGA onboard and NEW graphics card says no signal detected but PC boots up

chris25

Honorable
Aug 23, 2013
6
0
10,510
Hi, can anyone help me my onboard graphics just went dead right after I clean my system. I just took off the cpu fan and heatsink and blew dust out of it after that it said no signal detected. So I borrowed my friends low end graphics card it was inno 3d gt640 and it worked perfectly, so I was like ok the onboard is the problem. I then bought a new card the sapphire r9 280x dual-x, it didn't comes with free VGA-DVI adapter so i bought one too. When i finished the installation it displays no signal detected and another thing i don't know if it is usual but please answer my question, i tried to just connect tha VGA to the DVI-I adapter alone and it displays no signal detected and when i removed it then not connected, is that some sort of shorted in the adapter?. I tried to use the DVI-D and I and both didnt work. My pc also boots up and my speakers produces sound from windows as it boots to dektop. WHEn i press something on my keyboard it presents sound of errors and stuff which means it is okay its just not displaying video.. Please help me...