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  1. #1
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    Dead Computer - Desktop

    I recently just moved and in the process I had to move my homebuilt PC as well. After putting together a desk and the wiring the place up I connected everything and pressed the power button... except nothing happened. Theres not much more to describe than that, but I'll list things I know/tried:

    -the power supply is a 480W Thermaltake Xaser III
    -It was first plugged in through a UPS battery backups
    -I tried plugging it directly into the wall, trying 3 different sockets
    -Other devices work when plugged into these sockets
    -I opened the case up and checked that the power supply was connected securely to the Mobo (it was)
    -I checked to make sure that the on/off switch was connected securely (it was)
    -I held the power button in for 10 seconds to make sure that some other type of mode wasn't activated
    -I toggled the power supply power switch a few times to see if that helped

    other info:
    its a 2.8ghz p4 on a GIGABYTE mobo (i can get the model# if needed)
    2 hard drives, 2 optical drives, floppy, radeon 9800 pro video card, 1 GB of i forget what type of memory


    I saw <post:=603,275>post 603,275</post:> and was really hopeful but as i got towards the bottom i noticed there was no solution <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15> <img src=/S/crybaby.gif border=0 alt=crybaby width=15 height=15>

    Does anyone know if you need a certain amount of power to power the 480W power supply? maybe I don't have sufficient power here? there is an AC unit in this apt and I could try hooking the computer up to it's "special" socket (its a single 3 prong socket) to see if that works.

    Any thoughts or suggestions? I don't know how long I can function without my own computer here! <img src=/S/sad.gif border=0 alt=sad width=15 height=15>
    <img src=/w3timages/blueline.gif width=33% height=2>
    <big>John</big>

  2. #2
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    Re: Dead Computer - Desktop

    John,
    I suppose one could make the argument that comments from me might be ignored since my similar (laptop) problem was unresolved. Nonetheless, here are my starting suggestions. If your "nothing happens" includes no power supply fans turning, then the problem is basic and the tests should start basic. The path from the wall socket to the hot side of the power switch needs to be checked. The plug and power cord have to be visually inspected, touched and moved. If there is a line fuse and/or overvoltage protection they have to be checked. Then the power switch has to be checked. If you can verify there is ac voltage on both sides of the power switch (when turned on) then additional testing is needed.

    I do not believe any minimum power consideration is at the root of your problem. If you can plug a lamp into the wall socket and have it work, the ac power source is probably OK

    Paul

  3. #3
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    Re: Dead Computer - Desktop

    Paul, any suggestions are welcome! how do you know if there is a line fuse or overvoltage protection?

    and to clarify - no fans, power supply or otherwise, turned on. Although when i first pressed it, the power LED blinked on for probably less than a second. I don't know if it retained some sort of charge or maybe i instantly burned something out, but it did blink for a short short time.

    the power switch seemed to be fine, but i'll double check that.

    i'm thinking its the power supply at this point... <img src=/S/sad.gif border=0 alt=sad width=15 height=15>
    <img src=/w3timages/blueline.gif width=33% height=2>
    <big>John</big>

  4. #4
    Uranium Lounger viking33's Avatar
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    Re: Dead Computer - Desktop

    John,
    If the unit worked Ok before the move, I would certainly suspect something was loosened, disturbed or disconnected. ( rather than failed )
    I would get in there and give everything a firm unplug and replug to make sure all is seated and in place. A visual look is not as good as actually replugging all the connectors back in place. If you have another power supply, substituting it would be a good test.

    AND....just what is that "special" socket you talk about? I would make double sure that it's a regular 110 volt AC socket and not some other supply that will immediately "toast" your entire machine.
    BOB
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  5. #5
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    Re: Dead Computer - Desktop

    Thanks for the input, Bob. I'll be sure to re-sit the connectors. I also have some new information - after trying to turn on my computer again, i first turned off the power supply's main I/O switch for about 5-10s. To my suprise, the machine whirred for about half a second before cutting out. what this tells me is 1) the main power switch is infact OK - which in turn suggests that the motherboard is OK if the connection is being made in the first place. 2) its probably the power supply since nothing can power up and it retains the previous charge until i shut off the hot connection.

    so tomorrow i'm going to but a new power supply and hope that it fixes my problem. i'll be sure to report back to you guys to let you know!
    <img src=/w3timages/blueline.gif width=33% height=2>
    <big>John</big>

  6. #6
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    Re: Dead Computer - Desktop

    This will happen if the power connection to the motherboard is wrong, or the CPU is missing, or...

    I think it is more likely to be a motherboard fault than a PSU, but it wouldn't be the first time one of my guesses was wrong.

    StuartR

  7. #7
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    Re: Dead Computer - Desktop

    for my sake i hope your guess is wrong <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15>

    but i'll keep that in mind if it doesn't work.
    <img src=/w3timages/blueline.gif width=33% height=2>
    <big>John</big>

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    Re: Dead Computer - Desktop

    John,
    I just realized the cause of your problems - today is Friday the 13th ! Tomorrow it will probably work just fine.
    Cannot say I followed the latest results you just posted, though it is a sign of life.
    Waiting for your next report.

    Paul

  9. #9
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    Re: Dead Computer - Desktop

    <P ID="edit" class=small>(Edited by skitterbug on 13-Oct-06 21:02. I had 220 but I think the correct number is 240V for across the pond?)</P>I had a computer that wouldn't boot. For the "fun" of it, and of course while the computer was unplugged/or shut off - since it was "dead" anyways - I flipped the "red" switch (on mine) for the volt selector between 110V and 240V settings. Then I switched it back to 110 and plugged it in, hit the switch and it booted. I do these crazy things when I get really frustrated and sometimes they actually help! <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15> In reality, something must have been jarred out of place in the moving of the computer but I haven't a clue what! <img src=/S/nope.gif border=0 alt=nope width=15 height=15> I was just glad it turned on again.

    I know, it's <img src=/S/crazy.gif border=0 alt=crazy width=15 height=15> but it happened!


    "Peace begins with a smile. "-- Mother Teresa

  10. #10
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    Re: Dead Computer - Desktop

    haha, in my desperation i actually tried that earlier... unfortunately it didn't work for me <img src=/S/sad.gif border=0 alt=sad width=15 height=15> i guess i just wasn't as lucky as you! however switching those settings did lead me to uncover new info about my problem so it is a good suggestion!

    hopefully the new powersupply tomorrow helps my situation <img src=/S/please.gif border=0 alt=please width=31 height=23>
    <img src=/w3timages/blueline.gif width=33% height=2>
    <big>John</big>

  11. #11
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    Re: Dead Computer - Desktop

    hopefully the new powersupply tomorrow helps my situation

    I sure hope so! I'll keep my <img src=/S/crossfingers.gif border=0 alt=crossfingers width=17 height=16> for you! Sometimes that works too! <img src=/S/rofl.gif border=0 alt=rofl width=15 height=15> Good luck!


    "Peace begins with a smile. "-- Mother Teresa

  12. #12
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    Re: Dead Computer - Desktop

    well, turns out you were partly correct <img src=/S/laugh.gif border=0 alt=laugh width=15 height=15> it also turns out that i'm an idiot.

    I said: "-I toggled the power supply power switch a few times to see if that helped" Well, when i turned my computer "on" it was infact, off. and when i turned it "off" and then back "on" to see if that helped clear the power supply of whatever was "clogging" it, it was infact... on, and then off (hope you are still following me). So after seeing that the power LED light turned on for a few milliseconds before the power died out to it when i turned it "off" and then "on" (which were actually on, then off), i realized that the problem might be the switch was backwards... in my head. So i switched the switch and turned it on when it was "off" and voila! it worked! this really made my day so the embarassment of the simplicity of the problem didn't bother me at the time... but now i'm quite <img src=/S/blush.gif border=0 alt=blush width=15 height=15>

    How it happened: when I moved, my friend took out my computer from my room and must have switched it off by mistake when he helped carry it to my car, and since I never turn off the main power switch I never thought that that could be the problem. Apparently the AC/DC converter stores a little bit of a charge when its off, so that was what finally tipped me off.

    oh well, lesson learned <img src=/S/yep.gif border=0 alt=yep width=15 height=15>
    <img src=/w3timages/blueline.gif width=33% height=2>
    <big>John</big>

  13. #13
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    Re: Dead Computer - Desktop

    <hr>...so that was what finally tipped me off.<hr>
    Surely you mean tipped you on? <img src=/S/evilgrin.gif border=0 alt=evilgrin width=15 height=15>

    John
    <font face="Script MT Bold"><font color=blue><big><big>John</big></big></font color=blue></font face=script>

    Ita, esto, quidcumque...

  14. #14
    Uranium Lounger
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    Re: Dead Computer - Desktop

    <hr>Apparently the AC/DC converter stores a little bit of a charge<hr>
    Actually, it's the capacitors that are storing that little bit of juice. But that's just me being picky. <img src=/S/smile.gif border=0 alt=smile width=15 height=15>
    -Mark

  15. #15
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    Re: Dead Computer - Desktop

    <img src=/S/drop.gif border=0 alt=drop width=23 height=23>
    <img src=/w3timages/blueline.gif width=33% height=2>
    <big>John</big>

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