Computer won't turn on

By lost at walmart
Dec 22, 2007
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  1. I have a dell demension 4700 and it won't start i push the power button all that happens is the power light blinks once.
  2. Fragrant Coit

    Fragrant Coit TechSpot Maniac Posts: 579

    More than likely you need a new Power Supply.
  3. Tedster

    Tedster Techspot old timer..... Posts: 10,074   +13

  4. xf1fty1ne

    xf1fty1ne Newcomer, in training

    If you have a spare Power Supply lying around, install that and see if that's your problem. Which it most likely is. Post back with results.
  5. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    i have extra power supplys but this power supply is 305 volt and i don't find those often. I guess i would have to buy one but i'm not sure if that is the actual problem.
  6. Daveskater

    Daveskater Banned Posts: 2,031

    305V? I've never even heard of that before, only 110/240V @ 60/50Hz. What country are you in?
  7. ravisunny2

    ravisunny2 TS Ambassador Posts: 2,057   +8

    No country has 305V power supply.

    Obviously a typo.
  8. Daveskater

    Daveskater Banned Posts: 2,031

    Must be. He must mean 305W. If that's the case, you don't have to have the same power PSU as your old one, as long as you have one good enough to power your PC.

    E.g. you oculd buy a 1KW PC if you wanted to, but it would only give your PC the power it needs.
  9. ravisunny2

    ravisunny2 TS Ambassador Posts: 2,057   +8

    305 W is a pretty odd figure.

    Goes againt the principles of engineering.

    Probably is 300 W or 350 W.
  10. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    I checked it is 305 W.
  11. ravisunny2

    ravisunny2 TS Ambassador Posts: 2,057   +8

    Ok. If that is what it says.

    Is this written on the PSU, or a figure from some s/w ?
     
  12. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

  13. ravisunny2

    ravisunny2 TS Ambassador Posts: 2,057   +8

    s/w is short for software.
  14. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    it's on the psu.
  15. Daveskater

    Daveskater Banned Posts: 2,031

    It would only be written on the PSU because all software can tell you is what voltages are coming out of the PSU.

    305W is a random number, but PSU's are like that. You can get 385W as well. You could pretty much get any number under the sun :D (so long as it ends in 0 or 5 ;))
  16. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    then what should I do?
  17. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    what wattage would be sufficient to power the computer.
  18. Daveskater

    Daveskater Banned Posts: 2,031

    I can't tell you what wattage you should get because I don't know your specs, but if you go here and input your specs, it will tell you about how much you need, but you will want to add 30% on top of what it gives you.
  19. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    i'm not sure what some of this things:how do know what rpm your hard drive is and what kind of processor i have? what is compacitor aging and what if the video card i built in the mother board?
  20. Daveskater

    Daveskater Banned Posts: 2,031

    how do know what rpm your hard drive is
    unless you have a laptop, it will be 7,200 rpm. If it's a laptop, you will almost certainly have 5,400.
    If you have a SATA hard drive (which you will have if you bought the PC in the last couple of years) just select the amount of drives that you have. You can check this in My Computer.

    what kind of processor i have?
    Right click on My Computer and click Properties. On the left hand side it will tell you what CPU (Processor) you have and how much RAM.

    what is compacitor aging
    set this to 15%

    what if the video card i built in the mother board?
    If you don't have a built in nVidia chipset, select the first option "32mb or less AGP/PCI Video"
  21. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    it says I need 259 Watts
  22. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    it says i need 259 Ws plus 30% is about 336 Ws but that was more than i had before.
  23. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,746   +156

    This problem is not caused by your power supply. It is software or hard drive issues
  24. lost at walmart

    lost at walmart Newcomer, in training Topic Starter Posts: 41

    do you have a clue as to which one?
  25. Tmagic650

    Tmagic650 TS Ambassador Posts: 20,746   +156

    You have got to run some diagnostics on the hard drive first... Seagates Seatools is good regardless of what kind of hard drive you have
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