No Display Output After First Stage of Boot

https://reddit.com/link/qk8vxx/video/20nv9sywtxw71/player

As title. When I was creating an EFI for HP Elitedesk 800G2 SFF w/ OpenCore 0.7.4 for installing macOS on it. It boots, however it doesn't have display signal as well. Everything remains black after the verbose. I've tried the following to fix the problem:

-Make sure all drivers/kexts are up-to-date

-Reset NVRAM

-Set graphic memory to 512MB

-Plug in the cable with another port

Spec:

CPU: i5-6600T

GPU: Intel Graphics HD530

RAM: (Total 8GB RAM)

Ethernet: Intel Ethernet Connection (2) I219-LM

Motherboard: Unknown (Should be HP OEM motherboard as well)

EFI by me: https://drive.google.com/drive/u/1/folders/1jJB_RPynlHxqlz8Nyo7fhIXH7IvUs5aZ