Hello, we have recently had some products returned (they were installed and operating in the field for around 2 months before they were returned). After looking at the boards it seems the vias have failed.
We now have 2 pc pcbs
with the same Via fault, all other vias on the pcb look Ok.
Attached are some pictures of the failure. Any information regarding possible causes is appreciated.
The vias that are damaged are connected to the same net (they are in series).