[URGENT] G5 AHT gives fan error but all fans are running

Discussion in 'Mac Pro' started by xfarsightx, Oct 29, 2010.

  1. xfarsightx macrumors newbie

    Joined:
    Oct 29, 2010
    #1
    Hello All,

    I have a Power Mac G5 (Late 2005 - regular cooling heatsink) and its not booting up. Apple Hardware Test gives the following error:

    2FAN/4/8: CPU A INTAKE

    This is our Main Server running DHCP, DNS, AFP and Netboot. so its really critically I have it up and running.

    So far I have semi disassembled and air canned it. So no dust. All the fans are working however the fans next to the heatsink seems to run a bit slow then others.

    I have unplugged all the extra hardware (RAID Card). Have reseated the memory and have tried different memories. Did the PRAM reset.

    I am stumped. Any clue, advice or help will be appreciated.

    Thanks!
     
  2. Spanky Deluxe macrumors 601

    Spanky Deluxe

    Joined:
    Mar 17, 2005
    Location:
    London, UK
    #2
    It may just be that the sensor in the fan's not working right and so the hardware test is reporting a problem. Get iStat on it and see what fan speeds it reports. I don't know what the 'normal' fan speeds are on a G5 but someone else on here with a similar machine might be able to give you an idea.
     
  3. xfarsightx thread starter macrumors newbie

    Joined:
    Oct 29, 2010
    #3
    [closed]

    Thanks for the reply and apologize for my late reply.

    So after many hours of trail and error I narrowed it down to power consumption issue. I had a set of RAID drives running which seemed to cause problems. I double check the RAID card with another computer and their was no problem so it lead me to believe that the power consumption by the 3 RAID drives was the culprit.

    I don't want to plug in the RAID setup in it to be sure of the problem so I am leaving this one alone.

    I had to reinstall the MAC OS X server and pulled out the whole RAID setup and so far it has been running good.

    Didn't look further into this
     

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