Problem on start-up in my desktop PC

Faye3

Honorable
Sep 22, 2014
16
0
10,510
Hello guys...
So when i click the start button of my PC i get a black screen, when my fans,lights and everything else are running as well, so the thing is i have to wait like 3 or 4 min to click on the restart button then the PC boot up properly.
This happens only when i shutdown my PC then press on the start button, i have three RAMs on my MOBO and i tried to put each one by one to know the defect one, plus i unplugged the hard disks, video card at each time, i cleared my CMOS and the CMOS battary as well, but still the same issue.
my PC component is :
ASUS p8z77-m Motherboard
GTX 770 LE Graphic card
10 GB RAMs (4-4-2)
650 GB (1 SSD- 2 HDD)
Oh and by the way, this problem started when i unplugged the power cable from my power supply, So can u guys please help me with this :??: