Hey Ive always been using a laptop when i wanted to do pc gaming but my old laptop broke years ago
Since then ive been using my ipad msotly and sometimes the family computer

After a year of saving i finally got an asus desktop , when i baught it it came with the mouse and keyboard but not a monitor so I decided to use the family computers monitor since nobody uses that computer exept for me ocasionaly

Tried wiring it up but whenever i try turning my comp on it says no signal and shuts down
Well the monitor says it but the desktop remains open
My guess is something related to the conection between the monitor and the desktop
But maybe you might know more

I used to be good at setting up computers but after i took a break from all that i forgot most of my techniques

Be extremely specific please might not reconise most names of parts

If you need a pic of the wiring I can show you it  

Pic of the wiring

The one that connects to the monitor is the blue one

And something that came with it but feels to light to be anything
Its magnetic

Pic 2  

Try plugging the VGA cord into the Graphics Card instead of the On-Board graphics slot. It's below the where you put it.  

Posted by Stratus

Try plugging the VGA cord into the Graphics Card instead of the On-Board graphics slot. It's below the where you put it.

Which ones the vga cord?  

The one with the blue head  

Posted by Stratus

The one with the blue head

didnt work  

Blue VGA cable to the black VGA port near the bottom that also has the white DVI and HDMI port on it.  

VGA port adapter for DVI?  

Maybe try using a DVI or HDMI cord, VGA doesn't work for me either  

try plugging the Blue VGA cable in the GFX port insted of the on-board one.
if this doesn't work,try using an HDMI cable.it would work for sure.
also check if any of ur cable is faulty or something.

ik this is dumb to ask but did u plug the Memory sticks(RAM) in the 2 rail(mostly) black RAM port or the other one.