Please check the voltage and let us know. Unfortunately, there's not much one can do to avoid PSUs dying. I've lost monitors, AV receivers and some other gear. In most cases, it's the power supply because the switching puts a lot of stress on the components and these things get smaller and smaller.
Again, if you can, please measure the voltage of the power rails. You might need to add a load, e.g. a very large resistor or the like to make sure there's some drain.
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