If you can, take a few pics of the entire board and the underside.
You have to test a few other parts on the PSU. Of course, you test the components with the power supply off. Start by testing the pair of switching transistors using an ohmmeter or a digital multi-meter set to the diode test range. Check each transistor for a short between emitter and collector. If shorted, replace them. Also, blown transistor are due to bad capacitors, check those too. Whatever you find bad, replace.
Like Mitsu said, never power up the power supply without a load on it, bad things happen.
Once you have replaced the failed components, the supply should be tested under load. Instead of using a game board, just in case, use a 1 ohm 50 watt resistor to create a "dummy load", connected between the +5 volt output and ground (DC COM), it will draw 5 amps from the supply, which is adequate for test purposes. You can also add a 5 ohm 50 watt resistor to the +12v line and ground. Test away to make sure you have all your proper voltages.
Let us know how you make out.
You have to test a few other parts on the PSU. Of course, you test the components with the power supply off. Start by testing the pair of switching transistors using an ohmmeter or a digital multi-meter set to the diode test range. Check each transistor for a short between emitter and collector. If shorted, replace them. Also, blown transistor are due to bad capacitors, check those too. Whatever you find bad, replace.
Like Mitsu said, never power up the power supply without a load on it, bad things happen.
Once you have replaced the failed components, the supply should be tested under load. Instead of using a game board, just in case, use a 1 ohm 50 watt resistor to create a "dummy load", connected between the +5 volt output and ground (DC COM), it will draw 5 amps from the supply, which is adequate for test purposes. You can also add a 5 ohm 50 watt resistor to the +12v line and ground. Test away to make sure you have all your proper voltages.
Let us know how you make out.
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