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Freshly built computer not POSTing

CentipeedCentipeed Registered User regular
edited July 2007 in Help / Advice Forum
Is it POST or Post? I don't know.

Anyway, I've just built a computer, and it's not posting. Here's the list of stuff you should know before making suggestions as to why it's gone wrong:

* Mobo is getting power, as indicated by the LED on the motherboard.

* Mobo risers ARE installed, in all of the places that it is possible to install them

* When the power button is pressed, the fans spin up for a brief moment before dying again, as does the light on the CD drive.

* Mobo is 24 pin. Both the 20 pin and the adjoining 4 pin connector are plugged in

* RAM has been reseated, and is in the first slot.

* Video card has been switched for another, and the same problem persists.

* The same problem also occurs if I don't have the video card, DVD drive and Harddrive connected in any way.

* Video card is PCI-E, but it's low level, and does NOT have the 6 pin power connector anywhere on it.

* I have double checked the Power/Reset button jumpers which run from the Motherboard to the front of the case. They are all in the correct places and seated properly.

Any suggestions?

Centipeed on

Posts

  • SarcastroSarcastro Registered User regular
    edited July 2007
    If you're using a larger case which can fit more than one type of motherboard, make sure your motherboard screws are in the correct positions. if you put in a wrong one, it will bump up on the board and short it out - easy mistake to make, I spent hours troubleshooting this one once.

    Sarcastro on
  • SilmarilSilmaril Mr Ha Ha Hapless. Registered User regular
    edited July 2007
    Check the processor.

    Silmaril on
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  • CentipeedCentipeed Registered User regular
    edited July 2007
    Sarcastro wrote: »
    If you're using a larger case which can fit more than one type of motherboard, make sure your motherboard screws are in the correct positions. if you put in a wrong one, it will bump up on the board and short it out - easy mistake to make, I spent hours troubleshooting this one once.

    I checked, and I used every riser that I screwed in.
    Silmaril wrote: »
    Check the processor.

    I reseated it, but I don't have another AM2 processor I can swap in, so I can't test it that way.

    Centipeed on
  • WerrickWerrick Registered User regular
    edited July 2007
    * I have double checked the Power/Reset button jumpers which run from the Motherboard to the front of the case. They are all in the correct places and seated properly.

    Recheck this, some of the indications can be misleading. Then recheck it again, this has screwed me up more times than anything.

    Werrick on
    "Civilized men are more discourteous than savages because they know they can be rude without having their skulls split, as a general thing."

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  • SporkAndrewSporkAndrew Registered User, ClubPA regular
    edited July 2007
    Not helpful at all but it's POST (Power On Self Test)..

    SporkAndrew on
    The one about the fucking space hairdresser and the cowboy. He's got a tinfoil pal and a pedal bin
  • HeliosphanHeliosphan Registered User regular
    edited July 2007
    I had something similar awhile ago, it was due to the fact i put in RAM from a different PC into an HP model.
    I got pretty much the same results, PC starts for a few seconds, fans go full blast but it never properly went through POST.
    The RAM that i put in was compatible with my board, due to this I always believed that HP are, in fact, asshats when it come's to upgrading one of them. So my advice is check the RAM.

    Heliosphan on
  • NightholdNighthold Registered User regular
    edited July 2007
    Listen to Helio. When I built my last computer I had the same problem and it turned out to be a bad stick of RAM. I tested both sticks individually and found that when a particular one was not inserted the PC posted fine. I RMA'd it, got a new stick, and all is well.

    Alternately it could be that something is shorting, your power supply cant handle the load, the mobo was damaged somehow, etc.

    Before all that though, I would definately rule out the RAM.

    Nighthold on
    A Player Of The Unplayables.
  • CentipeedCentipeed Registered User regular
    edited July 2007
    Werrick wrote: »
    * I have double checked the Power/Reset button jumpers which run from the Motherboard to the front of the case. They are all in the correct places and seated properly.

    Recheck this, some of the indications can be misleading. Then recheck it again, this has screwed me up more times than anything.

    I checked it again and again, checked all the ground symbols and whatnot, only plugged in the power switch cable. All resulted in the same problem.
    Heliosphan wrote: »
    I had something similar awhile ago, it was due to the fact i put in RAM from a different PC into an HP model.
    I got pretty much the same results, PC starts for a few seconds, fans go full blast but it never properly went through POST.
    The RAM that i put in was compatible with my board, due to this I always believed that HP are, in fact, asshats when it come's to upgrading one of them. So my advice is check the RAM.

    RAM is compatible with this motherboard. Both are custom, so I don't have an HP PC or whatever.
    Nighthold wrote: »
    Listen to Helio. When I built my last computer I had the same problem and it turned out to be a bad stick of RAM. I tested both sticks individually and found that when a particular one was not inserted the PC posted fine. I RMA'd it, got a new stick, and all is well.

    Alternately it could be that something is shorting, your power supply cant handle the load, the mobo was damaged somehow, etc.

    Before all that though, I would definately rule out the RAM.

    I don't have another stick of DDR2 I can test with :(

    Centipeed on
  • HeliosphanHeliosphan Registered User regular
    edited July 2007
    It might be worth trying one stick of RAM, seeing what happens then trying the other.

    And i was not meaning you had an HP machine, i was merely drawing from my own experience.

    Heliosphan on
  • CentipeedCentipeed Registered User regular
    edited July 2007
    I only have 1 stick of RAM to use, so I can't try one and then the other, unfortunately.

    Centipeed on
  • NightholdNighthold Registered User regular
    edited July 2007
    It might be worth getting another stick to test it out. If its none of the above, you could try returning the mobo and getting another. Could just be a bad board.

    I suspect its the ram though.

    Nighthold on
    A Player Of The Unplayables.
  • CentipeedCentipeed Registered User regular
    edited July 2007
    I'll likely take it into a computer shop and ask them to swap stuff out one by one and see if it POSTs. It'll be easier than buying new components and doing it myself.

    Centipeed on
  • NightholdNighthold Registered User regular
    edited July 2007
    I sympathize. Nothing is more frustrating than shelling out all the cash for componants, and meticulously putting everything in its place, only to see a black screen and hearing a beep. Sucks.

    Like I said though, assuming everything is actually plugged in OK, I suspect its either a bad stick of Ram or a bad mobo, either of which is fairly common.

    Nighthold on
    A Player Of The Unplayables.
  • The Crowing OneThe Crowing One Registered User regular
    edited July 2007
    Centipeed wrote: »
    I'll likely take it into a computer shop and ask them to swap stuff out one by one and see if it POSTs. It'll be easier than buying new components and doing it myself.

    Picking up another stick of RAM may be worthwhile, anyway. Definitely sounds like the RAM is the culprit. What're you running? If you're under 2gigs, check around for another stick... like my father always says, "memory is the best upgrade for your money."

    The Crowing One on
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  • MKRMKR Registered User regular
    edited July 2007
    Is it dual-channel RAM?

    MKR on
  • kaliyamakaliyama Left to find less-moderated fora Registered User regular
    edited July 2007
    Would having no RAM keep it from POSTing? it does a memory check, no?

    kaliyama on
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  • CentipeedCentipeed Registered User regular
    edited July 2007
    kaliyama wrote: »
    Would having no RAM keep it from POSTing? it does a memory check, no?

    But if the RAM is just dead, then it wouldn't complete the circuit, surely.

    I'm returning the RAM, anyhow.
    MKR wrote: »
    Is it dual-channel RAM?

    http://www.dabs.com/productview.aspx?QuickLinx=4B15

    Centipeed on
  • MKRMKR Registered User regular
    edited July 2007
    Centipeed wrote: »
    kaliyama wrote: »
    Would having no RAM keep it from POSTing? it does a memory check, no?

    But if the RAM is just dead, then it wouldn't complete the circuit, surely.

    I'm returning the RAM, anyhow.
    MKR wrote: »
    Is it dual-channel RAM?

    http://www.dabs.com/productview.aspx?QuickLinx=4B15

    I'm pretty sure that's dual channel, meaning you need two sticks.

    Ask the guy at the store.

    MKR on
  • DeusfauxDeusfaux Registered User regular
    edited July 2007
    are you getting any beeps even

    Deusfaux on
  • khainkhain Registered User regular
    edited July 2007
    kaliyama wrote: »
    Would having no RAM keep it from POSTing? it does a memory check, no?

    No RAM on my Motherboard at least keeps it from POSTing. I also suggest checking your motherboard I know mine at least has the 24 pin power and then has another 8/4 pin power, I'm not sure it wil keep it from POSTing though. Also try moving the RAM to a different slot, the slot could potentially be broken or have something in it thats preventing it from recognizing the ram and not allowing it to post.

    khain on
  • DeusfauxDeusfaux Registered User regular
    edited July 2007
    make sure it's the right power going into the right places

    there is 4pin OR 8pin ETX power, apart from the 20 or 24 or 20 + 4 pin ATX power


    the 4 pin on each could be trouble if mixed

    Deusfaux on
  • CentipeedCentipeed Registered User regular
    edited July 2007
    My motherboard has a 24 pin power socket (Which I use the 20 + 4 pin connectors for) and then an extra 4 pin power socket, for which there is NO connector on the power supply (And the + 4 connector on the 20 + 4 connectors doesn't fit).

    And I'm sure Dual Channel RAM doesn't NEED two sticks. It just means that they can be used as Dual Channel if you wish. I mean, you can choose to put it in non-dual channel configuration, as per the manual.

    Centipeed on
  • wunderbarwunderbar What Have I Done? Registered User regular
    edited July 2007
    Centipeed wrote: »
    My motherboard has a 24 pin power socket (Which I use the 20 + 4 pin connectors for) and then an extra 4 pin power socket, for which there is NO connector on the power supply (And the + 4 connector on the 20 + 4 connectors doesn't fit).

    ya, you need that connector on the Power supply, otherwise it will never work. Looks like a new PSU for you.

    wunderbar on
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  • trixtahtrixtah Registered User regular
    edited July 2007
    MKR wrote: »
    Centipeed wrote: »
    kaliyama wrote: »
    Would having no RAM keep it from POSTing? it does a memory check, no?

    But if the RAM is just dead, then it wouldn't complete the circuit, surely.

    I'm returning the RAM, anyhow.
    MKR wrote: »
    Is it dual-channel RAM?

    http://www.dabs.com/productview.aspx?QuickLinx=4B15

    I'm pretty sure that's dual channel, meaning you need two sticks.

    Ask the guy at the store.

    What? If it supports dual channel it doesn't mean you need two sticks..

    trixtah on
  • DeusfauxDeusfaux Registered User regular
    edited July 2007
    Centipeed wrote: »
    My motherboard has a 24 pin power socket (Which I use the 20 + 4 pin connectors for) and then an extra 4 pin power socket, for which there is NO connector on the power supply (And the + 4 connector on the 20 + 4 connectors doesn't fit).

    And I'm sure Dual Channel RAM doesn't NEED two sticks. It just means that they can be used as Dual Channel if you wish. I mean, you can choose to put it in non-dual channel configuration, as per the manual.


    whoa so you dont even have everything plugged in?


    of course it's not gonna work dude


    you cant swap those plugs, and you need ALL of them powered

    Deusfaux on
  • MKRMKR Registered User regular
    edited July 2007
    Centipeed wrote: »
    My motherboard has a 24 pin power socket (Which I use the 20 + 4 pin connectors for) and then an extra 4 pin power socket, for which there is NO connector on the power supply (And the + 4 connector on the 20 + 4 connectors doesn't fit).

    And I'm sure Dual Channel RAM doesn't NEED two sticks. It just means that they can be used as Dual Channel if you wish. I mean, you can choose to put it in non-dual channel configuration, as per the manual.

    Yeah, I got it mixed up with something else. Whoops.

    MKR on
  • CentipeedCentipeed Registered User regular
    edited July 2007
    Deusfaux wrote: »
    Centipeed wrote: »
    My motherboard has a 24 pin power socket (Which I use the 20 + 4 pin connectors for) and then an extra 4 pin power socket, for which there is NO connector on the power supply (And the + 4 connector on the 20 + 4 connectors doesn't fit).

    And I'm sure Dual Channel RAM doesn't NEED two sticks. It just means that they can be used as Dual Channel if you wish. I mean, you can choose to put it in non-dual channel configuration, as per the manual.


    whoa so you dont even have everything plugged in?


    of course it's not gonna work dude


    you cant swap those plugs, and you need ALL of them powered

    See, it's moments like these the forum needs a *Smacks hand against forehead* emoticon. Here's the low down:

    The computer works fine now. I thought that I didn't need to fill the 4 pin power socket, because the PSU didn't come with a 4 pin power connector. Turns out the 8-pin connector that it did come with split into 2, although this wasn't easy to see.

    So, uh, problem solved...

    Centipeed on
  • NightholdNighthold Registered User regular
    edited July 2007
    ... you're killing me Centipeed.


    Ah well. Glad its working.

    Nighthold on
    A Player Of The Unplayables.
  • DeusfauxDeusfaux Registered User regular
    edited July 2007
    Centipeed wrote: »
    Deusfaux wrote: »
    Centipeed wrote: »
    My motherboard has a 24 pin power socket (Which I use the 20 + 4 pin connectors for) and then an extra 4 pin power socket, for which there is NO connector on the power supply (And the + 4 connector on the 20 + 4 connectors doesn't fit).

    And I'm sure Dual Channel RAM doesn't NEED two sticks. It just means that they can be used as Dual Channel if you wish. I mean, you can choose to put it in non-dual channel configuration, as per the manual.


    whoa so you dont even have everything plugged in?


    of course it's not gonna work dude


    you cant swap those plugs, and you need ALL of them powered

    See, it's moments like these the forum needs a *Smacks hand against forehead* emoticon. Here's the low down:

    The computer works fine now. I thought that I didn't need to fill the 4 pin power socket, because the PSU didn't come with a 4 pin power connector. Turns out the 8-pin connector that it did come with split into 2, although this wasn't easy to see.

    So, uh, problem solved...


    some newer mobos have an 8pin ETX. some power supplies will have just the 4 pin, some a 4pin and an 8 pin (my corsair for example), and others an 8pin that can be split into 2 4 pins (you'd only use the one)

    Deusfaux on
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