I have a Mastech HY3005 power supply that died about two years ago and I'm finally getting around to try to fix it.

When I power up the unit, the voltage display will show between 0 and 1.4 volts (as I move the adjustment knobs) while the Amperage display shows 0. I have tried putting a load on it (10 ohm 10 watt resistor) with no effect. I also checked with a multimeter and the outputs do not show any voltage.

The supply hasn't been modified at all. I did open the case to look for obviously damaged parts, traces, or loose wires and didn't find any.

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