Question about RCA HD50LPW175 50" HDTV

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Atx 300 my power supply (atx 300) would stay on only for a second or two. i checked it and find out that the fan would only rotate for a second or two also. what could be the problem?

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  • RCA Master
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Hi, look with PSU's ya don't muck around... simply replace it with a similar spec'ed one... they are all the same more or less.

The reason it won't go is that it is faulty, OR ya have a Fault on ya MotherBoard that is stopping the PSU from working... PSU's are so cheap these days replacing is much easier and less expensive than repair.

Regards Chris

Posted on Jul 28, 2008

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  • Master
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Hello wazalac,

This may be the failure of the power supply itself. Did you take voltage readings of the outputs. I would venture to say that the problem is either with the switching power supply oscillator, or the high power MOSFET switch. Check for blown fuses, and if you have a ohmmeter check to see if the high power MOSFET is shorted. You will need a schematic, and a multimeter to do this.

Thank you,


Shuttle83

Posted on Jul 28, 2008

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