Results 1 to 3 of 3
  1. #1
    iMac G5 - blank Screen and High Speed Fan
    Mike1872's Avatar
    Member Since
    Jan 18, 2010
    Posts
    3
    Unhappy iMac G5 - blank Screen and High Speed Fan
    I have ready similar posts, but nothing I have done will fix this problem. I have an original iMac G5 20" 512MB PowerPC OS X 10.4.11. It has been great for many years. Suddenly, for the past two months, if I leave it on and go away for 60 or more minutes I come back and the system is locked up (only holding down the power button for 5 seconds will shut it off) and the fan is running full speed.

    I opened it up, went through the four light diagnostics, passed everything, but did the RESET anyway. BTW - the iMac is well ventilated and has no dust built up inside. It is still locking up after letting it sit unused for a long period of time. After more research I download the temperature monitor software. My CPU is running at 72 degree C. I don't know if that is too hot?

    Any ideas for next steps? New power supply? Software patch? New power management card (is there one?)?

    Thanks,
    Mike1872

  2. #2
    iMac G5 - blank Screen and High Speed Fan
    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    20,061
    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    Same answer Apple Hardware Test and please don't say you do not have the original install discs.

  3. #3
    iMac G5 - blank Screen and High Speed Fan
    Mike1872's Avatar
    Member Since
    Jan 18, 2010
    Posts
    3
    Not following?
    HarryB - Thanks for your response. What do you mean "same answer"? I opened the imac and looked at the four LED's on the back as I powered up and did some testing and a reset. I never used any disks? Are there diagnostic disks I should be using? Could you point me to the KB article?

    Thanks,
    Mike1872

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Fan speed seems too high on my iMac???
    By Head_Unit in forum Apple Desktops
    Replies: 3
    Last Post: 05-28-2014, 04:34 PM
  2. High speed fan not kicking in.
    By dotdotdot in forum Apple Desktops
    Replies: 6
    Last Post: 06-01-2013, 04:00 PM
  3. high fan speed
    By mafac in forum Switcher Hangout
    Replies: 9
    Last Post: 08-03-2012, 04:36 AM
  4. iMac G5 - blank Screen and High Speed Fan
    By Mike1872 in forum Apple Desktops
    Replies: 1
    Last Post: 01-18-2010, 02:39 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •