9 Replies Latest reply: Feb 7, 2011 8:17 PM by Lilli Pilli
Lilli Pilli Level 1 Level 1 (0 points)
Computer shut down for 3 days. Tried to restart - Usual starting sound of fan and the 'boing', then nothing??? any suggestions please

Mac OS X (10.6.6), Mid 2007 20 inch 2.4 Ghz
  • Ralph Landry1 Level 8 Level 8 (37,175 points)
    Have you tried starting up in safe mode...hold down the shift key, and if the iMac starts up ok, then reboot and see if it starts again in multi-user mode.

    If that does not work, insert your Mac OS X install disk and startup while holding the C key...select the language then go to the utilities and run disk utility on the internal hard drive. Repair the disk, then restart and see if that clears the problems.
  • Lilli Pilli Level 1 Level 1 (0 points)
    Hi Ralph,
    Thanks for your suggestions. Tried Safe Mode - nogo. Tried OSX disc - nogo - in fact the disc is now stuck in the machine? I have even removed and replaced RAM
    Anything else that you think I can do?
    cheers
    Alan
  • Ralph Landry1 Level 8 Level 8 (37,175 points)
    Hi Alan,

    Have you tried starting while hodling down the mouse to force the disk to eject?

    The rest of it is sounding a lot like a logic board failure. Since the fan spins up and you can hear hard drive activity, probably not the power supply.

    Have you had the iMac open all the way? Have you looked at the capacitors, look like small soda cans (I prefer beer cans ) to see if any are bulging? If they are that is a sure sign of failure.

    You haven't said anything about an external hard drive or another Mac computer. If you had either, and the drive was bootable, could try starting from that drive or in target disk mode to make sure it was the logic board.

    Alternative is to take the iMac to an Apple authorized servioe person and have it checked out.

    Ralph
  • electronic fre@k Level 1 Level 1 (0 points)
    I have been having the same sort of problems with my imac. It will get stuck on boot though. The loading circle will keep going continuously. Restarting SMC wont work even my leopard install disk wont eject now. Im pretty sure you should take it into an Apple Retail store.

    Dom
  • Lilli Pilli Level 1 Level 1 (0 points)
    Hi Ralph,
    Thanks for suggestion re mouse - at least I have my OSX disc back. I have never opened machine. Apparently its quite difficult with an Imac (intel) machine.
    I am about to take to an authorised repairman.
    cheers,
    Alan
  • Ralph Landry1 Level 8 Level 8 (37,175 points)
    Hi Alan,

    At least partial success...let us know what the verdict is on the rest of the issues.

    Ralph
  • Lilli Pilli Level 1 Level 1 (0 points)
    Hi Ralph, The local PC repair shop has had the Imac open and tried a new hard drive - bad news, the problem is not the hard drive. Does the Imac have a BIOS battery like some of the older desktop machines? I have also seen some threads about capacitor failure. Otherwise similar threads point to a logic board failure. While I was away (and the PC was OFF) the temperature here hit 42 deg C - which may have been the temp in my study? Perhaps that contributed to the failure? Anyone out there with ideas?
    My next step is to take PC to nearest Apple Agent - which unfortunately is about 200km (120 miles) away.
    Thanks for your help so far.
    Al
  • Ralph Landry1 Level 8 Level 8 (37,175 points)
    Hi Al,

    Thanks for the update.

    Yes, iMacs have a battery on the logic board, small button type battery that usually has a life quoted as 5 years, which does vary a lot. If a repair tech has the unit open it is best to simply replace the battery as standard procedure, they are only a few dollars, US or AUS. And 42 C > 108 F should not cause damage, a little hot, but since the iMac was not running and trying to stay cool should not have been damaging to it physically.

    If you take the iMac to an Apple person, and they open it up and can repair for a price you find acceptable, make sure they put in a new logic board battery at the same time...that battery keeps the information in the PRAM up to date so the machine knows where to find the startup disk, etc.

    Ralph
  • Lilli Pilli Level 1 Level 1 (0 points)
    Thanks Ralph,
    I will let you know how I go.
    cheers,
    Al