Question about Cooler Master (RS-380PMSR/P) (RS380PMSRP) 380-Watt Power Supply

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My computer wont turn on

I'm using the coolermaster model [RS-380-PMSR / RS-380-PMSP] 380W. my computer wont turn on after the first attempt to power it up, but after some succesive pushing of the power button and leaving it for about 10 minutes before pushing the power button again it starts working

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  • Tim Babcock
    Tim Babcock May 11, 2010

    Do you see any diagnostic lights on your motherboard after plugging in the power supply?



    If so are they green?

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  • 21 Answers

Sound like 'classic' failing capacitor symptoms to me... RMA the power supply if you're able to, start scraping together some cash for either a rebuild (replace capacitors) if you can't OR purchase a NEW PSU

Once you get the system running... I would recommend you leave it turned on 24/7 as this will keep the failing capacitors at a static temperature (instead of the heating/cooling cycle) thus milking the last bit off life out of it while you secure a replacement unit.

Posted on Jan 26, 2009

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Dell optiplex 380 won't turn on


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1 or 2 extra hdds and ram does not require much extra power and your coolmaster should do the job. But if you intend to use a newer graphic card you should check the requirenments for wattage at your new card manufacturer product specification webpage. I am pretty sure that almost all newer graphic cards require at least 500 watt to run without problem. My advise is to buy at least a 550 watt psu although i don't know what is your hardware. Try to post your hardware specs and calculate for each component (cpu wattage+graphics wattage +etc) your power supply need to be over 50 wattage. Hope that helped!

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