Pc won't turn on after cleaning

[Tejulll]

Hey, i just cleaning my pc after more than 5 months. Just getting rid of dust. But, when i reassemble my pc, they won't turned on. I'm pretty sure i assemble it well. I read some of forums, they said i should do an Green Wire Test to my PSU, and i did it. My pc turned on while i do Green Wire test. And that's showed us the PSU just fine. And, is there someome could help me with my motherboard ? Because other forums said, if not my psu, the ur motherboard.


*sorry for my bad english

 

[The Paladin]

did you plug the 4/8 pin connector on the motherboard ?
did you plug the 24 pin on your motherboard
did you properly connect the pwr_switch connector to the motherboard ?
did you set power supply switch (back of pc) to on and not off ?
is your power supply set to correct voltage (115v or 220v) ?