PC won't turn on after tidying wires

[Kevin_]

Now and again I open up my PC just to blow dust off of the fans and sometimes make wires neater. This time I plugged my PC back in then nothing when I press the power button. No fans no LEDs nothing. I checked if i pulled a wire out but I couldn't see any, although I can't see the one going to the power button itself. I did unplug the Sata cable from my hard drive and plug it back in. Any ideas on what I've done?

 

[geofelt]

Dumb question:
Did you remember to plug in and turn on the psu switch after your cleaning?

Did you disturb the 24 pin power connector or the 4/8 pin cpu connector?
Are they both securely plugged in?

If your motherboard has a power button, try that.
If not, use a flat blade screwdriver to start the motherboard by touching the two pwr-sw pin on the front panel header.

 

[kapitalistas]

power cable 24pins going to motherboard may help check that.

 

[ss202sl]

This is a quick and easy way to double-check. Just make sure you actually check, and make sure they are plugged in properly - sometimes they look plugged in, and they're not.

http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

 

[Kevin_]

Okay I was being stupid, I found my power switch wires dangling around then I remembered plugging them in before -_-
Basically the power button was unplugged from motherboard