Are these PoE Switches?

I have had individual ports burn out on PoE switches before from having too much sustained current draw. The Linksys SRW224P was notorious for having port burn-out from PoE devices.

I have ran into consumer-grade switches failing quickly due to poor ventilation, but even that is pretty uncommon.

If the Netgear switch was part of their "ProSafe" line then you have a lifetime unlimited warranty on it and netgear will send you a new one. If the problem is in the AC Adapter then you are stuck buying a new one (assuming the switch has an external adapter).