wierd fan problem

Discussion in 'Computing and Networks' started by BlakesterGamer, Aug 23, 2016.

  1. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    ok i picked up a free dell dimension 8400 with a pentium 4 and 500 mb of ram and 160gb Hard drive so i turn it on and only sometimes it boots into windows xp home edition but almost every single time i try the fan starts spinning really fast and it gets super loud it gets almost as loud as my lawn mower some plzz help me!!!
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,565
    2,379
    Replace the fan!
    Max.
     
  3. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    ok i will try that
     
  4. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    I predict a more serious problem, but we'll see.

    How far along the boot progress does it get? Have you read your Event log?
     
  5. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    no the screen just goes black
     
  6. wayneh

    Expert

    Sep 9, 2010
    12,153
    3,059
    Do you know how to boot into BIOS (to avoid using the hard drive)? Or try booting from a CD or an external drive.

    The screen going black could be many things. When in the boot process does this happen, early or late? For instance a very earlier failure could be bad RAM whereas a late failure leans towards the video card.

    And keep in mind that, even if you succeed and get it working, it has virtually no value. Your local electronics recycling center may have ten machines similar to your's all in a pile. Know when to hold 'em, know when to fold 'em.
     
  7. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    ok
     
  8. MrSoftware

    Active Member

    Oct 29, 2013
    504
    124
    The fan is probably fine. Depending on the model, many of them have thermostatically controlled variable speed fans, and when you first turn them on some of them will go full speed for a brief couple of seconds. If there's something wrong that's causing the boot process to hang, then the fan might get stuck at full speed. OR something is going wrong causing the CPU to get really hot, which in turn would cause the fan to go full speed. In any event, I suspect the fan going full speed is a symptom, not a problem. Clean all the dust off and then see if you can sort out the boot problems.
     
  9. BR-549

    Well-Known Member

    Sep 22, 2013
    2,004
    394
    After neutralizing your body, pull all boards and re-seat. Memory, video....etc.

    Then listen for post code.........beeps.
     
  10. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,348
    Hello,

    With old systems, it can well be that dust has been collected in the heatsink.
    Hold the fan and blowout the heatsink.
    Also the fanspeed can be controlled by the motherboard.

    Bertus
     
  11. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    ok i put a new hard drive in i had laying around in storage and that fixed the fan prob but i still get no signal on the monitor so i replaced the ram but still no signal and then i got a old geforce4 card 64 MB out of a friends broken pc in my basement for repair i put it in the dell dimension and
    i turned it on the graphics card fan did not even spin up so i think i need to dig around in a bunch of old computers for a working graphics card
     
  12. MrSoftware

    Active Member

    Oct 29, 2013
    504
    124
    Graphics card fans are typically not the highest quality fans, it's possible that the fan on your buddies card is just dead. Unless it was working while still in his pc..

    If the settings in BIOS are not important to you, then it might help to restore the BIOS settings to the factory defaults so that you're starting from a known state. Sometimes you can select this option in the BIOS menu, sometimes there's a jumper on the motherboard to reset it.
     
  13. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    already tried that but thanks for the suggestion later today i am brining the pc to my local computer store
     
  14. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    ok i took the pc to my pc store and it is the motherboard
     
  15. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
    784
    How many pins on the fan connector?

    It could be sensing excessive temperature and running the fan flat out.
     
  16. BlakesterGamer

    Thread Starter Member

    Apr 20, 2016
    87
    1
    5 pins
     
  17. ian field

    Distinguished Member

    Oct 27, 2012
    4,415
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    I've never seen more than 4 - 2 for the supply, a PWM control and a temperature sense wire.
     
  18. wayneh

    Expert

    Sep 9, 2010
    12,153
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  19. ian field

    Distinguished Member

    Oct 27, 2012
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