Check if DP card is toast?

Is there any way to detect (on Linux) whether the DP card is toast? It worked precisely once, perfectly it must be said. Then on a second attempt, can no longer detect the display. I can detect all 4 usb-bridges but not the adapter. Is there any way to detect if the adapter just died? Or does anyone know how to get the card detected again?

Maybe as a reply to others: With “hwinfo --short”, my HDMI card is listed under unknown as “Framework HDMI Expansion Card”. My DP card does not show up, leading me to believe that it indeed died immediately.