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Thread: Motherboard/CPU problem

  1. #1
    Join Date
    Apr 2002

    Motherboard/CPU problem

    Ok, heres the deal. My friend needed a new fan installed so I go to his place, take out the old fan, and read the directions to install the new fan. it mentions that you have to take out the entire motherboard to secure the fan. This was no problem as I am not quite a novice with handling hardware. ( I built my computer from scratch from some basic directions on the internet). I remembered to wear the anti-static strip, the whole nine yards.

    Turns out the fan would not work with his motherboard type.

    So I put everything back together the right way, applied the bonding material back to the old cpu/heatsink. I turn it on and it started for 2 seconds and turned off. I figure I forgot to plug something in but I've double checked everything and it still won't work.

    When I do turn it on the lights on the keyboard flash for a moment and then nothing. No monitor response, nothing.

    What I need to know: Did I fry the board somehow? Or did I fry the Processor? Is this fixable?

    A little info on the system hardware:

    D865G Intel Motherboard
    Intel Pentium 4 Processor 3.0GHz 512k 800FSB
    300W power supply

  2. #2
    You didn't leave a screw or anything lying on the board.?
    You plugged everything in the right way.?

    Maybe try unplugging the power cord to the motherboard, and take out the internal battery for 10 minutes, then put the battery in, plug the power cord back.
    Then see what happens..


  3. #3
    Join Date
    Apr 2002
    The internal battery?
    'splain please

  4. #4
    Senior Member nihil's Avatar
    Join Date
    Jul 2003
    United Kingdom: Bridlington
    My friend needed a new fan installed
    Why? changing the heatsink and processor fan isn't something one does for the fun of it?

    What makes you think that the heatsink and fan
    would not work with his motherboard type
    ? You obviously managed to connect them?.......................normally the heatsink and fan would be appropriate to the processor, not the motherboard.

    So, if you have an Intel P4 3.0GHz Processor, and an Intel approved heatsink and fan they should work.

    Can we have some more details?

  5. #5
    Join Date
    Apr 2002
    He needed a new fan installed cuz the one he had installed rattled. It was still operational but he got tired of the grating noise. I tried using sewing machine oil (reccomended) and it didn't quiet it at all. So then he bought a new fan. I neglected to check if the new fan were compatible with the motherboard until I disconnected the motherboard from everything and removed the motherboard from the case. The motherboard uses a 478 mounting slot and the fan that he bought, a thermal take 2 uses a 775 slot. After finding out that the new fan was not compatible with the motherboard I proceded to put everything back the way I found it. I wiped off the old thermal compound off the processor, applied new thermal compound and put the old fan and heatsink back into place. I then turned on the computer only to have it start up for 2 seconds tops and then shut off. The fans are spinning and everything seems to be in place, this is my predicament.

    I need to know how to narrow down my options to
    1) I'm dumb and connected something wrong or
    2) I'm careless and somehow messed up the board and/or the processor

  6. #6
    Senior Member nihil's Avatar
    Join Date
    Jul 2003
    United Kingdom: Bridlington
    I am terribly sorry to hear that. It does not bode well for the processor at the very least. Provided that you RAN IT If you did not, then you may be lucky even if you did, there is still a fair chance.

    I suspect that the old fan may just have chosen your moment of "open fan surgery" to die on you.

    AFAIK, the modern Pentiums will detect overheating and shut themselves off................this could be what is happening? That would protect the CPU and MoBo, and the fan might APPEAR to be running OK but is just not delivering the goods.

    OK. You will need:

    1. An approved heatsink and fan might be worth getting something that would handle a newer replacement processor, just in case you did fry the old one?
    2. Some silver thermal compound (Arctic Silver or the like) http://www.arcticsilver.com/
    3. Cleaning Fluid (Arctic silver do this as well)

    Proceed to replace fan as per instructions. Be careful! you can use too much compound as well as too little.

    Give that a try....................if you do need a new processor then you will at least have a suitable fan.

    You might look at the MoBo around the CPU socket with a magnifying glass.............if there is charring then that is very bad news.

    Good luck

  7. #7
    Join Date
    Apr 2004
    Never in my life have I heard of having to take out the entire motherboard to replace a heatsink and fan...

    How did you handle the motherboard? What surfaces did you place it on... etc... How did you handle the CPU? How did you scrub off the old compound?? We need details on how you went about this procedure...

    Sounds to me either you messed up the CPU or the motherboard... I am not as optimistic as nihil ... I doubt replacing the fan with another one will help now... I think the damage has been done...
    I am the uber duck!!1
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  8. #8
    Junior Member
    Join Date
    Jan 2006
    I'd say from my guess with my experience as far as hardware goes. It is entirely possiable that you did fry something or have hooked up something wrong. Like The Duck said without more in depth details of what you did. Its hard to give you any help with your problem.

  9. #9
    Senior Member nihil's Avatar
    Join Date
    Jul 2003
    United Kingdom: Bridlington

    A lot of manufacturers tell you to attach the processor and cooling unit before inserting the MoBo into the case. That doesn't mean that you have to remove the MoBo subsequently.

    Socket 775 units look like this: http://www.pctoys.com/840556058366.html

    As can be seen, there are 4 mounting screws/fixtures so it is completely different from a socket 478 unit. From this, I would assume that you were not able to attach and run it.

    I do hope that you carefully replaced the little insulating washers when reinserting the MoBo, typically, they are orange in colour. I would also check that there are no lose screws or wires touching the MoBo, that might cause a short.

    Also check that the CPU fan is connected to the MoBo correctly, and that any sensor wires are also correctly attached.

    It turns on for a couple of seconds, and the keyboard lights flash. That suggests that the BIOS has initiated. Do you get any bleeps?

    Check all connections from the PSU, to ensure that they are firmly and correctly attached. Also check that memory and graphics cards are clean and firmly seated.

    We really do need some more information

  10. #10
    Senior Member
    Join Date
    Jun 2003
    hi reddfox,
    Before i contribute with a few suggestions i would just state that i dont like your 300w powersupply.
    (considering no that cheap cpu 3.0 intel i would invest little bit in something more decent.
    Golden rule and that is rule no.1 dont touch/change anything until it works.
    I have done very very similar thing and 1 day before lan party decided that having silver termal paste would do miracle next day and managed to fry motherboard and cpu when instaled termaltake sensor on wrong place I had exactly same "2 seconds" work and then nothing.Had smelled little bit of burn and knew straightaway is time to organize funeral for both of them.

    Please post more informations even if you think they are irrelevant, more the better.
    What is your motherboard?
    I assume that you have new motherboard with that cpu.Some of them have feature like asus ones which is called c.o.p(cpu overheating protection).That will save you few hundrad dollars and cpu if you have it.

    Did you smell anything burned?
    Does your power supply works?
    Ary talking about this fan??
    If it is -it pays too read it and search before you buy as it clearly states there compatibility with which socket and which cpu
    Is this your motherboard?
    if it is i am sorry but it doesnt have c.o.p
    AS nihil asked any beep when booting?
    Does monitor have power?
    please post as much as possible

    My intention is in no way to critisize you or your action but try to get message accross that all the resourses are on the nett and in a visual presentation form so we just need to do some research. It takes few minutes and all info is there.(and free)
    Well believe it or not i even downloaded from thermaltake site how to install my termaltake sensor (after apllying paste on cpu) in coloured page-had them in front of me and my friend who is expert in hardware and we still managed to insert it wrong and cause $500 damage.
    Well from that excercise i learned about motherboards with cop and found that very handy feature.
    Me and probably most of us here learned doing expensive mistakes so we try to help others not to repeat them.
    Post more info

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