Mining Rig not booting up when GPU is connected

Hi All…newbie miner here. I just built my first mining rig using a MSI Z390 A - Pro motherboard. I have HiveOS installed on SSD and it boots up fine without the GPU (3060 ti), but when I connect the GPU the mining rig doesn’t boot up and all I get is a blank screen. No error message and it won’t let me get into the BIOS.

On bootup I see the GPU lights turn on and fan turns for about 5 seconds, then it stops and nothing else happens. I’m using an ASUS Geoforce RTX 3060 ti GPU.

I’ve switched out the riser twice but no luck. Any suggestions?

I’m having the same problem