Hey. So sometimes switching power supplies fail due to low incoming voltages. It’s an issue which has been mostly dealt with but may still happen. The issue is that a switching transistor must be on or off. That’s how it gets efficient and stays cool. If a long term low voltage situation arises the transisor may go into a linear state, not fully on or off.. and that’s the least efficient and most heat creating part of the curve.
Advanced power supplies like Furman and Panamax with low power disconnects can prevent this, but I’d be surprised if this happened. Most power supply makers are aware and have ways to prevent this issue from happening.
From what I've read, these situations often happen when power is being restored, or the power flickers, without actually surging.