Hi I got my Radeon VII last February, but for the past four months, it has not been outputting video when I boot up my PC.
I thought it was my Z97 motherboard, but I am experiencing the same issue on my new X570 motherboard. There is no BIOS display, it gives a no signal. I don't get such problems when I insert my old RX Vega 64 or RTX 2080ti from my other PC. It is not the HDMI or DisplayPort cables either, I have changed them multiple times and use high grade gold plated HDMI 2.0b cables.
I am not sure if it is a UEFI issue, though I never had this issue until the past four months. Not before the AMD rolled out the firmware update that fixed the lack of UEFI support in the Radeon VII and not for months afterwards until sometime in October 2019. I am using a 1000 Gold+ rated PSU and now running a Ryzen 9 3950X with a Gigabyte Aorus Master X570 motherboard.
Could you advise please?