What indicates that a fault occurred on a card after 24 hours of proper functioning?

The chosen answer highlights that the fault appearing after 24 hours of proper functioning indicates that there wasn't an initial quality issue with the card. Typically, if a hardware component, like a card, functions correctly for a significant period before failing, it suggests that the component met quality standards when it was first deployed. Instead of indicating an immediate defect or failure (which would classify as a DOA - Dead on Arrival), the scenario shows that the card was operational and performing as expected initially, which is a good sign regarding its manufacturing quality and initial operational integrity.

In contrast, if the failure were related to an initial quality issue, one would expect the malfunction to occur immediately or soon after installation. This scenario of a delayed fault suggests that external factors or later deteriorations might have influenced the performance after the initial testing period. Thus, the fact that the card worked properly for a full 24 hours serves as evidence against the idea that there was an intrinsic problem with its quality at the time of installation.