Computer Wont Turn On

[MrSmug]

Last Night after a night of work I shut off my PC. After getting ready for bed, It was very windy and heavily raining so I decided to unplug everything in my room (including my pc) just incase there was a powerouttage. Sure enough when I woke up there was. I was glad that I unplugged everything. I went into my room to plug my pc back in, and it doesnt turn on. My light and monitors work. I tested the powersupply and it does work. I don't know what the problem could be. It was working fine Yesterday.

 

[R_1]

tested the PSU how? paperclip? paperclip "test" just verifies the PSU can power itself on.
what model PSU? the power switch is connected to motherboard? will the system boot by shorting the power pins?

 

[MrSmug]

tested the PSU how? paperclip? paperclip "test" just verifies the PSU can power itself on.
what model PSU? the power switch is connected to motherboard? will the system boot by shorting the power pins?

The powersupply is a coolermaster GX550 with 100% japanese capacitors bought last week. I used a wire from an old cable in the garage (copper cable) to test the PSU. The power switch is connected and no shorting the power pins didn't work.

 

[R_1]

http://www.tomshardware.com/answers/id-3169175/coolermaster-gx550-550w-bronze-power-supply-good.html
I have a feeling that inrush current, plugging the unit back in, damaged something.
do you have another PC you could try the PSU on?
you bought it last week? do you have an old unit you can try?
IDK your specs but try a single stick of RAM. try the RAM in a different slot. Clear the BIOS/UEFI (check motherboard manual for procedure). disconnect the GPU's power and try to boot see if the lower demand allows the board to boot.
IMHO its either the motherboard or the PSU. the reputation CM PSU's have is why I'm looking so hard there.
visually check the motherboard for leaky ruptured capacitors.

always follow proper grounding procedures when working inside the case
http://www.wikihow.com/Ground-Yourself-to-Avoid-Destroying-a-Computer-with-Electrostatic-Discharge