Yesterday i opened my computer case to remove the my gpu to clean it and removed the RAM from the 2 slots,after i had finished i put them again in their places in the case,and plugged all the cables then i pressed on the power button i found that my PC doesn't want to start although my cpu fan was running and everything was running good inside the case but the screen doesn't show anything. I tried removing my gpu and putting it again and removing the RAM and change their places but the problem still exist.What should i do to solve this problem that makes me very angry.i'm afraid of dicovering any of my PC pieces is dead.
My PC
I5 3340,3.1GHz
GIGABYTE GEFORCE GTX 960 WINDFORCE 2X OC 2GB
KINGSTON HYPER X FURY BLUE 8GB (4X2)
ASUS H61 M-K MOTHERBOARD
GIGABYTE 500WATT PSU
Note:i didn't remove anything from the case except my gpu and RAM
My PC
I5 3340,3.1GHz
GIGABYTE GEFORCE GTX 960 WINDFORCE 2X OC 2GB
KINGSTON HYPER X FURY BLUE 8GB (4X2)
ASUS H61 M-K MOTHERBOARD
GIGABYTE 500WATT PSU
Note:i didn't remove anything from the case except my gpu and RAM