When Starting up, Computer hardware lights are on but Monitor, KB/M is not

[SoulOfDerp]

ASUS 24x DVD Writer
WD Blue WD10EZEX 1TB 7200rpm 64MB 3.5 Inch HDD
Samsung 960 EVO Series - 250GB PCIe NVMe - M.2 SSD
Antec NeoEco II Series NEO-ECO2-550 80Plus Bronze 550W PSU
MSI GeForce® GTX 1070 GAMING X 8GB GDDR5
Corsair VENGEANCE® LED 16GB (2 x 8GB) DDR4 3000MHz C15 - White LED
AMD RYZEN R7 1700 3.7GHz 16M L3 8 Core 16 Thread 65W AM4
Gigabyte GA-AB350M-Gaming 3 AM4 M.ATX
Win10


Once in a while (maybe once every 5 startups) this will happen. All lights within the case is on, RAM, Display, CPU, etc. But Both Monitors stay at "nothing to display", KB/M also have no lights on. No beep sound no nothing.

If I unplug power cord, it may work after one or multiple unplug and re-plug. If the PC do start up, nothing seems to be wrong I can use it for gaming, Youtubing, video editing for 15+ hours and nothing seems to be off. But next time I turn off the computer, I may not be able to turn it on again.

The only new addition to the PC is that I pug in a second Keyboard. But could it actually be the case? Both Keyboards seem to be functional.

 

[SoulOfDerp]

Still having trouble... I tried like 20 times today until I can actually use my PC and nothing seems to work, and then when I was just giving up and keep turning it on and off it boots.... but I dont know when it will refuse to boot again.