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    Computer power supplies

    So I have this desktop PC that is suddenly not even turning on. I'm guessing it's the power supply, but here's my questions:

    Should I invest in a power supply tester to determine this for sure, or just go ahead and replace the power supply?

    And, also, where is the best place online/brick and mortar to buy one? Is there a great disadvantage to buying a cheap one? It's a fairly cheap HP desktop that really only my kids use, so I'm not looking for top of the line equipment.


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    Re: Computer power supplies

    Hope it is the power supply and not the motherboard too because a bad mobo can also cause it to not power up at all too. The actual power switch is another possibility too.


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    Re: Computer power supplies

    Quote Originally Posted by isucyfan View Post
    So I have this desktop PC that is suddenly not even turning on. I'm guessing it's the power supply, but here's my questions:

    Should I invest in a power supply tester to determine this for sure, or just go ahead and replace the power supply?

    And, also, where is the best place online/brick and mortar to buy one? Is there a great disadvantage to buying a cheap one? It's a fairly cheap HP desktop that really only my kids use, so I'm not looking for top of the line equipment.
    I would check Tiger Direct first, if you have one close by. They have just about everything you'd think you might need for computers. Prices are decent as well.



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    Re: Computer power supplies

    The thing you have to make sure of is to buy the right power supply for your board. (connectors) You can get away with a 400 watt for cheap anymore. What model is your HP? I could see what will work for it.



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    Re: Computer power supplies

    Are they any lights at all? even with the case open, are their lights on the motherboard? I would do this:

    Open the case, remove all power connections and any memory, expect for the power cord to the Motherboard. And remove all peripherals on the back/front, including the monitor. we only want to turn on the MB.

    Turn on your PC. If that works, something is wrong with one of the devices. Then add the memory, if it boots, add another item.


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    Re: Computer power supplies

    Do you know ANYONE that plays with building computers? I always 4 or 5 extra laying around...you may find someone that'll give you one or check craigslist for parts for that matter. I wouldn't buy a new one for an olf HP rig like that, personally. If you do buy....just go through like newegg.com. They are decent. A number of good online stores.



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    Re: Computer power supplies

    Quote Originally Posted by travman23 View Post
    Hope it is the power supply and not the motherboard too because a bad mobo can also cause it to not power up at all too. The actual power switch is another possibility too.
    Yeah, I thought about those, and am just wondering if, since the power supply is such a common problem, if I should just try replacing that first.


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    Re: Computer power supplies

    Quote Originally Posted by isucyfan View Post
    So I have this desktop PC that is suddenly not even turning on. I'm guessing it's the power supply, but here's my questions:

    Should I invest in a power supply tester to determine this for sure, or just go ahead and replace the power supply?

    And, also, where is the best place online/brick and mortar to buy one? Is there a great disadvantage to buying a cheap one? It's a fairly cheap HP desktop that really only my kids use, so I'm not looking for top of the line equipment.
    I think it's worth it to spend a little more on a power supply like Corsair, Seasonic, etc. You can get a good one from newegg for $50 or a bad one from Best Buy for $50. You decide.



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    Re: Computer power supplies

    Quote Originally Posted by bostinelosd View Post
    The thing you have to make sure of is to buy the right power supply for your board. (connectors) You can get away with a 400 watt for cheap anymore. What model is your HP? I could see what will work for it.
    It's an a1630n.


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    Re: Computer power supplies

    Quote Originally Posted by keepngoal View Post
    Are they any lights at all? even with the case open, are their lights on the motherboard? I would do this:

    Open the case, remove all power connections and any memory, expect for the power cord to the Motherboard. And remove all peripherals on the back/front, including the monitor. we only want to turn on the MB.

    Turn on your PC. If that works, something is wrong with one of the devices. Then add the memory, if it boots, add another item.
    No lights at all. No signs of life.


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    Re: Computer power supplies

    If it won't turn on, it's probably either the power supply or system board. "swaptronics" is probably the easiest way to figure out where your problem lies.

    If it's an HP, there's a chance you'll need to get a custom one, and these can be costly. If it is a custom PS, you're probably best off getting a cheapie tester:
    Newegg.com - Rexus PST-2 20/24pin Power Supply Tester - PC Tools
    and then making sure it's the PS before you go ahead and replace it.


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    Re: Computer power supplies

    Quote Originally Posted by isucyfan View Post
    No lights at all. No signs of life.
    I assume you didn't accidentally flip that little power switch on the power supply? I have to ask.



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    Re: Computer power supplies

    Quote Originally Posted by dmclone View Post
    I assume you didn't accidentally flip that little power switch on the power supply? I have to ask.
    No, but no offense taken...you always have to start with the simplest solution!


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    Re: Computer power supplies

    Quote Originally Posted by isucyfan View Post
    No lights at all. No signs of life.
    Unplug everything inside and outside the PC and remove the memory. then reattached the power to the MB and turn on. If that doesn't work, look into using a voltage meter to measure one of the power plugs output from the power supply. I would google for that first though.

    we want to be sure of what the problem is first before buying/replacing things. It very easily could be the PS, but MBs blow far more often.

    -keep.


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    Re: Computer power supplies

    Quote Originally Posted by isucyfan View Post
    It's an a1630n.

    This?
    http://h10025.www1.hp.com/ewfrf/wc/d...en&lc=en&cc=us



    If the case isnt slim and looks to have a standard size power supply you could get away with a 24 pin atx power supply.

    http://www.newegg.com/Product/Produc...82E16817104954

    Its cheap, but if its something you dont really care heavily about, you might be able to get away with it. Like others have said, you could probably get a used one somewhere local affordably or from a friend.


    Last edited by bos; 07-28-2009 at 10:29 AM.

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