Black screen after BIOS splashscreen

[FinnbarA]

After moving my system into a SFF case my PC boots and shows the Aorus splashscreen, after that it goes black with everything still running. The monitor does not show the "no signal" until I turn the PC off.

 

Before moving everything was working correctly. I also installed an NVME drive as a replacement for my old HDD and new PSU.

 

I am unable to go into BIOS or do anything.

 

Other threads haven't fixed my issue, can anyone help me please?

 

PC:

Ryzen 5 3600

Gigabyte Aorus B550i Pro ax

XFX RX580 8gb

Samsung 860EVO 500GB (boot drive)

A2000 1TB NVME drive (new)

Corsair SF600 (new)

Dancase A4

[FinnbarA]

I've managed to get into the BIOS, but still can't find a problem