[6.12.3] System can't reboot. Only Cold Start works. Black Screen After Bios Splash.

Good day everybody.

I have a strange problem with Unraid.

I can't restart the system.

My system can only boot cold.

When you restart, a black screen appears immediately after the Bios (ASUS) logo and nothing else happens.

The system can then be restarted via reset and the same thing happens.

A "cold start" via the power button also produces the same result.

Only when I turn off the system, unplug and plug it back in everything works normally until reboot.

I have tried the following so far:

- Mainboard replaced (Asus support told me that the Prime series can have sometimes a boot problem so i get a TUF one)

- Bios reset and update

- USB stick replaced. ( Tried Kingston, Corsair, Samsung and HP, all USB 3.0 )

- Ram removed, swapped, changed banks

- Everything removed from mainboard, USB devices, hard drives, NVME SSD, Network.

- Unraid versions 6.12.0 - 3 tried.

- Checks whether EFI folder exists (EFI folder has no - on the stick)

- Secure Boot is disabled

- Fast Boot is disabled

Unfortunately, I have no more ideas and need help. I hope I have attached all the information you need.

System Specs:

Intel i9 13900k

Asus tuf gaming z790-plus wifi d5 ( before a ASUS PRIME Z790-A WIFI )

128GB ( 4x 32GB DDR5 Corsair Vengeance 5600 MHz )

2x Adata 2TB NVME

2x Netac 2TB NVME

Coolermaster 850W PSU

2U Inter-Tech Server Case.

Alphacool Eisbaer Pro Cooler ( 3x 80mm 6000 RPM Fan )

The Problem can be reproduced everytime i reboot the System.

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