Any help? PC's on but not displaying anything on monitor

[<3!]

So my desktop computer is on.. But it's not. It appears on with my mouse lit up and green light flashing near the power button but it's a black screen and orange light on the power button on the moniter. (indicates usually when computer is off) I've switched my computer on and off numerous times and has worked twice in about 6-7hrs. And once it does go on it just auto turns off after a bit. I'm pretty sure it's not a virus because Norton would've detected it.. Any help is appreciated. Thanks.

[Polo™]

Unplug your monitor and plug it back in.

[<3!]

Unplug your monitor and plug it back in.

Derp. I've tried that, and I'm pretty sure it's nothing got to do with the monitor because it shows an orange light

[Polo™]

Derp. I've tried that, and I'm pretty sure it's nothing got to do with the monitor because it shows an orange light

Well im out of ideas.

[gamerboy667]

clean it out manuelly, take the cover off and de-dust it all, make sure it has a solid power source and if you have a newer moniter make sure it is configured to your desktop :P

i love working with computers :P

[Edlmann]

Run Malwarebytes' Anti-Malware if you get the time to. If not, and you have win7, try running the recovery windows on the DVD. If that does not work, try and check your comps, maybe some of them get overheated / are broken. So also check the airflow in your PC. 100's of things to check

[Hitman 47]

mayb ur internal components are failng like ur psx or ur graphic card or something or they are overheating or it might just be a lose of connection

[RottenTomato]

lol is your monitor connected to ur pc =.=, might be messed up drivers

[<3!]

Yepp checked all that.. It's still not working. Any more ideas?

[Nyan Cat]

Man U Have a Hardcore Problem There

[Krypton1x]

check the power supply.

[Jabuuty671]

Could be the VGA Cable, is the fan moving though?

[<3!]

check the power supply.

It's got nothing to do with it as the computer is on and the monitor is on but it's just blank..

[EminemJr]

Idk but once my screen was blank with a mouse...

[<3!]

Could be the VGA Cable, is the fan moving though?

Which ones the VGA Cable? And yeah fan is on.
@Jabuuty671