Frying hardware can affect much wider scope. I've had bad power supplies fry out taking the whole power circuit with it, and thus half (or whatever fraction) o

Frying hardware can affect much wider scope. I've had bad power supplies fry out taking the whole power circuit with it, and thus half (or whatever fraction) of the rack's power. I've also had bad power supplies bring down the whole machine as they shunted everything internal too. When things go bad, anything can happen. You can provide the best effort, and it'll usually work as expected, but there will always be something that can overcome your best efforts.