No Beep, No Display

[GarrettVW]

I recently wanted to setup my computer to have better cable management since I got a new desk. I unplugged everything and took my tower out on the back porch and took the side panel off to see if it was dusty. It was actually really dusty so I blew on it a bunch and picked out the dust bunnies. I also used some canned compressed air but I couldn't find the straw so I just held it close to some parts and sprayed it right side up. After I hooked everything back up and try to boot my PC it doesn't beep, everything is running and all fans are going but it also doesn't show any signal to either of my monitors. So I took the side panel off again and re-seated my GPU RAM and CMOS battery but I'm still running into the same issue. What do you think I did to my computer and what can I do to fix this?

 

[hang-the-9]

Double check the video cables. If you used the air can directly on the parts, you can get quite a bit of moisture on parts, try a different video card. Maybe a motherboard issue to, once again due to the air can.

 

[GarrettVW]

Double check the video cables. If you used the air can directly on the parts, you can get quite a bit of moisture on parts, try a different video card. Maybe a motherboard issue to, once again due to the air can.

I checked the cables and confirmed they work when plugged into a laptop. I tried a different video card, same issue. If it's the motherboard how could I confirm that and would it need to be replaced?

 

[GarrettVW]

I should add that after I dusted my computer and then hooked it all back up it was having the "no signal" issue. So I did some googling and read some where that sometimes if the CMOS battery gets dusty it can cause that problem so I took the CMOS battery out, wiped it down and plugged it back in. Now some friends are telling me it could be that the BIOS reset to on-board graphics and I just need to try booting that way to change it back to graphics card graphics.

 

[hang-the-9]

I should add that after I dusted my computer and then hooked it all back up it was having the "no signal" issue. So I did some googling and read some where that sometimes if the CMOS battery gets dusty it can cause that problem so I took the CMOS battery out, wiped it down and plugged it back in. Now some friends are telling me it could be that the BIOS reset to on-board graphics and I just need to try booting that way to change it back to graphics card graphics.

If an external card is installed it should automatically take over default video from onboard. Did you try using the onboard video? With and without the add-on card?

The only way to test a motherboard is to test every component on it to rule things out, RAM, CPU, Video Card, Power supply. If all of those don't fix it, need to try a new one and see if that works.