Recently I wanted to install a Gigabyte Radeon HD7870 in an older PC with an ASRock P67 Pro3 Mainboard. The surprise was big when the monitor didn’t show an image and the computer didn’t boot. Instead, the mainboard’s debug panel showed the error code 97. According to the manual this means “Console Output devices connect”. Not connectED but more likely in the process of initializing the graphics card and failing while doing that.
There’s an easy fix for that. Installing the latest BIOS version (3.30, installed at the time was 2.02) resolved the issue and the computer booted without problems.
The Codeslinger 
I have the same problem on my Z590 Taichi. It only does it if I connect it to my TV or my AVR. If I connect it to my wife’s cheap Dell monitor, it doesn’t get the error code. I can also fool it by connecting an HDMI to a different tv port using a Display Port to HDMI adapter out of my GPU.
LikeLike