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Does not power up past logo screen

820 Views 9 Replies Latest reply: Jan 9, 2013 11:01 AM by Comptech25 RSS
Comptech25 Calculating status...
Currently Being Moderated
Dec 21, 2012 1:42 PM

I just acuired a second hand emac.

After plugging it in and connecting the keyboard and mouse, I pressed the power button.

When the Apple logo screen came on, nothing happened.  (Not even the startup sound)

I followed the troubleshooting listed in the user guide which suggested holding the Option key and pressing the Power button.

This provided the option to select the hard drive.  Now the mouse does not move.

Any suggestions and assistance is greatly appreciated.

iMac, Mac OS X (10.1.x)
  • BDAqua Level 10 Level 10 (114,755 points)
    Currently Being Moderated
    Dec 21, 2012 2:04 PM (in response to Comptech25)

    Power it down & see if holding the Shift key at bootup helps.


    Might be time to replace the PRAM Battery, 4 years is close to their lifespan, far less if ever without AC power, & can cause strange startup problems...


  • BDAqua Level 10 Level 10 (114,755 points)
    Currently Being Moderated
    Dec 21, 2012 4:59 PM (in response to Comptech25)

    Tough without the Install disc, but some things to try...


    Does it boot to Single User Mode, CMD+s keys at bootup, if so try...


    /sbin/fsck -fy


    Repeat until it shows no errors fixed.


    (Space between fsck AND -fy important).


    Resolve startup issues and perform disk maintenance with Disk Utility and fsck...



    Report errors.


    Does it boot into Open  Firmware with CMD+Option+o+f ?



    reset-nvram (press Enter)

    set-defaults (press Enter)

    reset-all (press Enter)


    Have you done a PRAM reset, CMD+Option+p+r...



    In fact, do 3 in a row, takes a bit of time.

  • BDAqua Level 10 Level 10 (114,755 points)
    Currently Being Moderated
    Dec 22, 2012 8:22 PM (in response to Comptech25)

    OK, good luck & keep us posted!

  • Allan Jones Level 7 Level 7 (29,575 points)
    Currently Being Moderated
    Jan 9, 2013 9:36 AM (in response to Comptech25)

    Does the serial number fall within any of these ranges:


    • G8412xxxxxx- G8520xxxxxx
    • YM412xxxxxx - YM520xxxxxx
    • VM440xxxxxx - VM516xxxxxx


    If so, the logic board may well have a near-fatal flaw that is not economical to repair unless you live within driving distance of Eugene OR USA.


    The affected units are eMacs with 1.25Ghz processors and USB 2.0 logic boards. There are some rare 1.0ghz eMacs on USB 2.0 logic boards that were sold only to the edu-market that may be affected; the serial number will tell. There was an Apple Repair Extension Program to fix the problem but it expired over two yeas ago.


    Apple article showing where to find the serial number:


    How to locate the serial number and identify your model


    If you serial number is NOT among the dead, please use it to find out exactly what variant eMac you have using the chart in the article. There are two broad families within the eMac model name, with different troubleshooting issues. Knowing the exact variant early-on will make it easier for the community to help you.


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