That is unfortunate, however in some cases multi layer boards can be repaired, most often not, but in rare cases yes. That said generally it is not cost effective to attempt and is tedious with limited success. I spent years helping my father repair double and single sided boards, but nothing like the new multi layer boards. I do have a few I am currently tinkering with now from Z9 and Z9mini's with the same apparent failure. I do not have a Z11 board yet, so if you would be willing to part with it for research purposes let me know. My Father was the brains as far as circuits and how they worked I was just the eyes and the hands, but you pick up somethings if your around it enough.

Keith