G4 MMD metalicc burning smell-Need Help

Discussion in 'PowerPC Macs' started by BCS, Aug 6, 2007.

  1. BCS
    macrumors member

    Joined:
    Sep 23, 2002
    #1
    The other day I got a bad metallic burning smell coming from my G4. Then about an 15 minutes later it started going to sleep. I can't hear the fan running and think that's the problem. Is this an easy fix, How to do it. turning it off but will check back tomorrow if it will fire back up. The case fan is runnning but I don't the the cpu.

    Thanks,

    BCS
     
  2. macrumors 6502a

    masse

    Joined:
    May 4, 2007
    Location:
    MA/GA
    #2
    a case fan should last 5 years until you need to replace it. Shouldn't be a difficult fix if that is indeed the problem.
     
  3. BCS
    thread starter macrumors member

    Joined:
    Sep 23, 2002
    #3
    Thanks masse. Anyone know if any g4 tower cpu fan will work with the mmd. Found one on ebay, but for a single processor.

    BCS
     
  4. macrumors 68030

    slughead

    Joined:
    Apr 28, 2004
    #4
    The MDD had a special fan, it was huge IIRC.
     
  5. macrumors member

    Evergreen

    Joined:
    Jul 9, 2001
  6. BCS
    thread starter macrumors member

    Joined:
    Sep 23, 2002
    #6
    Seeing that it has two fans. I kind of find it hard to believe both went out at the same time. Besides the cpu fans what else could it be. The machine fires up and everythings fine, then after about 10 minutes it goes to sleep. I can hit the space bar and it come back on then will go to sleep with in a minute. I can still kind of smell a burning, but see no smoke and really can't pin point the location. Could it be the heat sink. I hate spending money on the old goat, but if it's cheap what the heck.

    BCS
     
  7. macrumors 6502

    AlexMaximus

    Joined:
    Aug 15, 2006
    Location:
    Boondocks
    #7
    Hello my friend,

    First of all, did you know that you can power up your G4 MDD tower when the side is open? You can do this for a couple minutes to check on the fans. However don't leave it in the open case configuration longer then a couple minuts because the case fan is not behind the heat sink and cant' cool it.
    Usually what happens is that the fan speed goes up as the heat of the CPU/heat sink goes up as a counter messure.
    Check on all the fans, now you may see the fan not spinning. Now you know which is bad. One other thing, you always talk about two fans on the CPU ??? On the G4 MDD usually you have only one bigger case fan (120mm) for the heatsink and two small fans for the Power supply.
    However, if its the case fan it wouln't be expansive. They are cheap those days. Just in case you don't have any budget, send an e-mail, I still have some laying around somewhere..
    Good luck :apple:
     
  8. BCS
    thread starter macrumors member

    Joined:
    Sep 23, 2002
    #8
    Thanks for the reply. I did open the side to see which one wasn't running. I thought it was the power supply fans not running, but it is the case fan. The big one. Never replaced one before. Guess there's a first for everything. Are there any instructional site available, and are there better replacement then whats' currently in it that you can just bolt in. I really appreciate the offer on the fan, unfortunetly I just realized I need to get it ASAP and I don't want to trouble you. Are there any overnight retail vendors I can order from that you would recommend or is this something I should be able to grab locally?

    Thanks again for the help.

    BCS
     
  9. macrumors 6502

    AlexMaximus

    Joined:
    Aug 15, 2006
    Location:
    Boondocks
    #9
    A word to the case fan

     
  10. macrumors 6502

    AlexMaximus

    Joined:
    Aug 15, 2006
    Location:
    Boondocks
    #10
    Found it..

    Found the one I have, it really works great. Here is the link:

    http://cgi.ebay.co.uk/Panaflo-NMB-M...6356330QQihZ003QQcategoryZ80034QQcmdZViewItem

    Good luck

    Alex
     
  11. macrumors 6502

    AlexMaximus

    Joined:
    Aug 15, 2006
    Location:
    Boondocks
    #11
    In case you decide for the Panafol, here are two pics, once the Panaflo is in place. In pic 1 you see on the left corner the spot where you need to remove material to fit it in. (Good justification to finally go ahead and buy a dremel tool :D )
     

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