Question No Display but Computer Work

[DarkKevin10]

I was using my PC, but all 3 of my monitors lost signal suddenly at the same time.
I reboot the PC, but no signal and stay black.
Yet I can log into windows and control everything using my keyboard.
I was able to shut down using cmd.
Did my graphics card just broke?
I am using a riser cable too.

 

[rgd1101]

full system spec? include make and model of the psu

 

[DarkKevin10]

CPU:AMD ryzen 9 3950x
MB:Gigabyte X570 Aorus Xtreme
GPU:ASUS Strix GTX 1070 O8C
RAM:G Skill Trident Z RGB 3200MHz Cl14 32gb kit
Storage:
Samsung 970 EVO Plus 2TB NVMe M.2
2x Samsung 860 EVO 2.5" Sata III 2TB
PSU:EVGA Supernova 850w P2

I use Linkup PCIe 4.0 riser cable to mount the gpu vertically.

 

[jonnyguru]

I use Linkup PCIe 4.0 riser cable to mount the gpu vertically.

That's probably the problem. Can you put the graphics card directly into the slot to see if that works?