[SOLVED] Computer won't boot fully

Mar 3, 2019
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I am currently having a problem where my computer won't boot properly. All the fans turn on, the computer's lightning turns on (including corsair RGB cooler on the inside). After a little while the lights of my keyboard also turn on but my mouse does not light up. The display is not getting any signal at all. I am not even getting a bios screen. When I turn the PC off by holding down the power button it will turn off, but the keyboard will still be lit up and it will only stop being lit up when I turn my actual power supply off.
The PC will still boot sometimes, but only after trying several times and waiting a while each try.
Another weird thing is that the PC will run without any issues at all, once it has booted properly.
The specs of my PC are:
Motherboard: msi Z97 gaming 3
CPU: Intel 4770k
RAM: 16gb balistix
GPU: msi GTX1080
PSU: Xilence 800 watt
Keyboard: corsair k95 RGB
Mouse: Logitech Prometheus
I am sorry for my somewhat limited English, this is not my native language. I would be very grateful if someone would be able to offer a little advice in regards to what might cause this problem.