About all you can do now is take it apart and look up the price of each and every component. I'd be guessing because I haven't actually even had mine apart, but I think there's nothing more in there than a diode block and capacitors. I don't even think it has a contactor (relay). I'd bet that you can buy those components for about half the cost of the board.
You might discover a loose connector nut or screw inside the case. Then again, you might discover a crack in the board--in which case, you're buying a power supply anyway.
Not knowing your electronics skills and what you're comfortable with diagnosing, it's impossible to point you to a specific solution.
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Greg |